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After summer comes macOS. This long-standing tradition started by Apple is the most exciting moment of the year — seeing your Macs improve and gain new bells and whistles. In 2019, we're welcoming Catalina, the 10.15 version of macOS named after Catalina island in California. Apparently, it's hot.

The operating system boasts a whole lot of new macOS features like Sidecar, iOS apps porting, and major Photos update. To try the features right away, you can install Catalina from the Software Update tab.

However, be prepared for some troubleshooting. The acquaintance with the new macOS doesn't always go smooth — and with macOS 10.15 deeming support for lots of software, many things will not go smooth. We've collected the key macOS Catalina issues you may encounter, along with the ways to fix them.

macOS 10.15 Catalina problems and their fixes

Giving up Catalina is a decision you can choose to make. But before rolling back, ensure you use every bit of advice as to how you can fix the common problems. Sometimes, a quick fix can solve your concerns.

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Problems with macOS Catalina you can solve:

Unable To Verify Macos Catalina

macOS 10.15 Catalina won't install

This is the classic problem that arises with every macOS release: The installation won't start or you face the 'Catalina installation stuck' problem — when it freezes and you see no progress on the install. No matter how many times you start over, you keep getting an error trying to install Catalina.'

How to fix:

  • Apple recommends to reset SMC. Shut down your Mac, and hold Shift + Ctrl + Option + Power button for about 10 seconds, with your cable plugged in. Click on the power button and wait for your Mac to start up.
  • Try resetting NVRAM or PRAM. Shut down your Mac, and hold Option + Command + P + R for about 20 seconds. Wait for your computer to restart.
  • Reinstall from macOS recovery. Hold Option + Command + R to reinstall. Once you see the startup screen, start the installation again.
  • Some users reported they were prompted to enter administrator password several times to complete the installation. So it might be something for you to try as well.
  • In most cases, macOS Catalina cannot be installed on Macintosh HD, because it doesn't have enough disk space. If you install Catalina on top of your current operating system, the computer will keep all the files and still need free space for Catalina. So the easiest fix would be to clean up your system with CleanMyMac X before upgrading. All the system junk, app leftovers, and unneeded files will go away in a minute.
  • Backup your disk and run a clean install. This will wipe away your current system files, leaving space for macOS Catalina — so yes, this option is for the brave. If you use a solid backup solution, you'll keep your data safe, though. Get Backup Pro is a nice way to do it — unlike Apple's Time Machine, the app allows running bootable backups.

Say you've cleared up and backed up your disk. But your Mac still gets stuck at the installation and shows 'not enough space' error, so you can't get out of the cycle. In this case, there's another fix you can try:

  1. Reinstall Mojave. No worries, this won't delete your disk. Reboot your Mac and hold Command + R to enter the Recovery Mode. Click Reinstall macOS.
  2. Restore from your backup. If you have a Time Machine backup, enter the Recovery Mode again and select 'Restore from Time Machine Backup.' Select the backup from the list and restore your files. Check out how to use apple time machine.

Some users also report they tried to reboot into Safe Mode and take the installation from there; the others used a newly created admin user — but most attempts have been unsuccessful.

We must agree that macOS 10.15 is one of the slowest systems in terms of installation. But if you use the hacks described above and have a little patience, you'll be able to get to the 'Catalina installed' point.

Find more information about how to update mac os the right way.

If you can't login after upgrading to Catalina

There's a known problem of failing to login after the installation. Unfortunately, the only way to fix it — at least for now — would be to roll back to Mojave:

  1. Clean up your Mac with CleanMyMac X and backup your data.
  2. Save passwords to ensure you don't lose license keys and settings.
  3. Create a bootable installer of Mojave (after Catalina goes public, you can download Mojave here).
  4. Delete macOS Catalina: Apple menu > Restart > Command + R > Disk Utility > your startup disk > Erase.

One of the things Mac users are particularly excited about is the new Sidecar feature. It comes as a handy solution for those wanting to expand their workspaces. You can either mirror your Mac's screen to iPad or use your iPad's screen as an extension of a Mac.

If the only reason you're here is because you want Sidecar, we have to warn you it might not work with your new macOS. Reddit is full of user reports about the feature unavailable on macOS Catalina. Most likely, this is the issue of compatibility.

How to fix:

Here are the ways to fix Sidecar problems:

  • Get the new iPadOS 13. Unfortunately, macOS Catalina doesn't work with iPadOS 12. So basically, you have to use the recent operating systems if you want to try Sidecar.
  • Make sure your Mac is one of the compatible devices. Sidecar works on:
    • 2019 Mac Pro
    • Late 2018 Mac mini +
    • Late 2018 MacBook Air +
    • 2017 iMac Pro
    • Mid 2016 MacBook Pro +
    • Early 2016 MacBook +
    • Late 2015 iMac +
  • Try connecting your iPad with a cable. With Sidecar, you should be able to connect your iPad wirelessly. If this doesn't work, the cable might solve the issue.

Battery drain on macOS Catalina

Many of the previous macOS releases were known for battery life concerns — greedy apps, Safari and Chrome draining battery, or power-saving not working. There has been no major battery drain issues reported by the Catalina users so far.

How to fix:

Just to make sure you don't encounter the problem as well, here are a few precautions:

  • Check for apps that use significant energy. For a quick insight, check Apple's in-built Activity Monitor. It shows the 'Energy impact' for every application — calculated based on CPU, network usage, and other factors.
  • Have a solution for battery health monitoring. iStat Menus is a perfect fit if you need detailed analytics on disk activity, CPU usage, battery life, memory load, and much more. The app shows all the data right in your menu bar. Plus, you can customize what's being monitored flexibly.
  • Use Screen Time to limit the use of apps. This is the brand-new app on macOS Catalina, which helps you live a healthier Mac user life. Set time limits for the use of specific apps or app categories and schedule downtime. The main goal is to track how much time you spend on the computer, but you can also use it to optimize battery life on Mac.

Apps not working on macOS Catalina

In the attempt to speed up your Mac's performance, Apple is killing 32-bit app architecture with the release of Catalina. This means you have to switch to 64-bit, for good. You might see the messages like this when trying to launch an app:

The chances are it's one of the oldies.

How to fix:

CleanMyMac X can pretty much solve every app problem on macOS Catalina.

Uninstall all 32-bit apps in a click

No more digging through the settings. Download CleanMyMac X and batch uninstall every outdated app on Mac.

  • Use Updater to search available app updates. Maybe the app is not working, because it needs upgrading. If you've missed the update notification, you won't know about this. To solve the issue, CleanMyMac X will show you the full list of apps with available updates from developers. The best thing is you can run a batch update right in the app.
  • Uninstaller gives you an easy way to reset or get rid of 32-bit apps. The Apple way of checking for 32-bit applications is quite easy: access About This Mac > System report > Applications. However, once you find apps with the outdated architecture, you'll have to go and uninstall each of them separately. The Uninstaller feature in CleanMyMac X simplifies things for you — filter by 32-bit and get rid of each of them.
  • If there's no particular reason an app misbehaves, try resetting it. Guess what, CleanMyMac X has it covered too. In Uninstaller, click on the arrow button next to the app and choose Reset. As easy as that.

While app notarization takes time, you can expect many apps being unavailable after the release of Catalina. This doesn't mean they are gone for good, though. Contact developers or follow official developer announcements to find out about compatibility plans.

OneDrive client problems on Catalina

Due to Catalina's new security settings, Microsoft's OneDrive may have a problem accessing your drive — even if you allow a full access. This is because macOS 10.15 comes with two disk volumes by default.

How to fix:

There are no surefire fixes just yet, but you can try to troubleshoot OneDrive by setting it up from the very beginning. This worked for some users, according to the Reddit discussion:

  1. Unlink your account and quit OneDrive.
  2. Remove OneDrive client from your Mac and delete the folder.
  3. Set up OneDrive again and make sure you allow full disk access in Security & Privacy.

iCloud problems on macOS Catalina

The most common issue with iCloud is that users are unable to download their folders. You can try downloading iCloud files separately — but that's going to be a pain if you have an extensive library.

How to fix:

The best fix would be using Forklift app for your file management. The app is Catalina-ready and allows connecting local drives, Dropbox, iCloud, and tons of other storage sites.

If you're setting up iCloud, there might be another issue standing in your way: Not being able to agree to the Terms and Conditions. The window will just keep popping up on your screen. An easy way to fix this would be to access System Preferences > Internet Accounts and then click on the iCloud icon. You'll see a static Terms and Conditions window — click Accept and you're good to go.

Replacing iTunes on Catalina

The new macOS 10.15 brought along the end of iTunes and the birth of the new Music app. Basically, it looks the same — but with music-only content. There's a huge difference for people who rely on syncing Apple Music with third-party apps. The new app doesn't support XML file support, which makes playlist syncing impossible across many apps. So if you use Apple Music for DJing, you'll definitely have a problem.

How to fix:

The only fix to suggest here would be to stay away from Catalina if you need your XML apps to work with iTunes.

Music library issues

New Music app keeps freezing

There have been reports about the new music app freezing on Mac. Well, it's the first splitting of iTunes, so it's no wonder it doesn't go smooth. In most cases, your Mac will keep showing the 'library updating' status.

How to fix:

  1. Create a backup of your entire music library.
  2. Move your music out of the music folder.
  3. Go to ~/Library and remove every file related to 'Music' and 'iTunes.'
  4. Delete music caches in ~/Library/Caches.
  5. Restart your Mac and try to access the library again. It should be working now.
Catalina

Memory usage problems with Apple Music app

Another problem you may come across is the Music app eating too much of your space. One user wrote the app used over 30GB of memory on his Mac.

How to fix:

Unable To Verify Macos Catalina Install

Apparently, the problem is related to the memory management of Album Art. It is getting better, though. According to user reports, memory usage goes back to normal after restarting the app.

Mail search is broken

According to forum posts, your mailbox might get pretty messy after the upgrade — with no search functionality whatsoever. So if you try searching by keywords or recipient/sender name, the app will keep showing the numerical number of results. The reason could be the new Spotlight integration.

How to fix:

  1. Open System Preferences > Internet accounts and remove your mail account.
  2. Restart your computer and once again add your mail account to the app.
  3. Try searching through your emails — it should be working now.

There have also been some early reports about emails missing from the Mail app — so you might want to wait for it to get fixed before upgrading, especially if you rely on Apple Mail.

Slowing down and overheating macOS Catalina problems

So here's the thing: macOS Catalina should be faster than Mojave. 32-bit architecture was one of the things slowing an operating system down. It's gone, and so are the issues with slow apps. Unfortunately, you can expect your Mac go slow and overheat anyway.

How to fix:

Unable To Verify Macos Catalina Island

  • Too many login items often cause your Mac to go slow. To eliminate the problem, disable apps from launching at startup. Go to System Preferences > Users & Groups > Login Items. Check the apps you don't want to run at startup and click on the minus button.
  • Reset SMC. This is a universal fix that helps solve the issues with overheating, battery life, slow Mac, and more. The process is pretty simple and doesn't impose any risks of losing your data. To reset, shut down your Mac, but leave a charger plugged in. Hold Shift + Ctrl + Option + Power button for about 10 seconds. Click on the power button and wait for your Mac to start up.

Dock disappearing on macOS Catalina

On the Apple forum, people mentioned Dock disappearing from their screen after upgrading to Catalina. The nature of this mistake is unknown — some users connect it to PRAM resetting, the others say they had the issue when trying to work across two screens.

How to fix:

Try Option + Command + D. If it doesn't work for you, do the following:

  1. Go to Settings > Dock
  2. Change the Dock's size so that it starts flickering
  3. Change the hide/show settings
  4. Customize the Dock's position on screen (you can do it randomly).
  5. Close the window and check whether it's working now.

Internet not working after upgrading to Catalina

If you're putting macOS 10.15 over your current system, you're likely to encounter Internet connection problems.

How to fix:

The radical way would be to clean install macOS Catalina — it's healthier for your Mac and will probably fix the issue. If you're not ready to take a risk, try rebooting your Mac.

There has been a user report saying that Sophos caused the problem of network connection. So uninstalling it may be a fix as well.

Bluetooth not available on macOS Catalina

Well, that's a problem. Definitely a huge one if you use AirPods. Deleting your Bluetooth.plist files might be the way to solve this.

Unable

How to fix:

  1. Open Finder > Go > Go to Folder
  2. Type Library/Preferences
  3. Find a file with the name 'com.Apple.Bluetooth.plist' and delete it.

Safari extensions not working

While Apple is trying to transition to iOS-compatible extensions, it gradually deems support for many web extensions formats. On Catalina, you'll face the problem with .safariextz files not working.

Macos

How to fix:

Just like with 32-bit apps, there's no way to fix the missing extensions. If you can't find a good alternative, you can switch to Chrome or another browser.

Storage filling up too fast

If you notice unusual storage filling up progress, this might mean your Mac captured too many redundant files during the Catalina installation. In most cases, these are APFS files and Time Machine backups.

How to fix:

If you can use a good Time Machine alternative like Get Backup Pro throughout the upgrade, do it. Otherwise, you can remove Time Machine leftovers after installing Catalina with CleanMyMac X. In the Maintenance tab, select 'Time Machine snapshots thinning,' and run a cleanup.

To remove snapshots manually, use the following Terminal commands:

  • To view the list of snapshots:
    tmutil listlocalsnapshots / tmutil listlocalsnapshots /System/Volumes/Data
  • To delete snapshots:
    deletelocalsnapshots

Here's a quick review of all mentioned fixes, which you can take with you:

Is macOS Catalina stable?

The short answer is yes — if you use it right. So before you decide to downgrade back to Mojave, make sure you've done the following things right:

  1. Backup your Mac with Get Backup Pro or any other reliable tool before running an installation.
  2. If you still need some of the Mojave functionality that won't be available in Catalina, install the new macOS on partition.
  3. Make your Mac as clean as possible before upgrading.
  4. Get iPadOS 13 if you want to use the Sidecar feature.
  5. Get rid of 32-bit applications, even if this means killing your darlings.
  6. Backup your Music and then empty the folder along with music-related Library caches. The new Apple Music app is still pretty much unpredictable, so you need to ensure you don't lose your playlist.
  7. CleanMyMac X is a solution for many Catalina issues, so you need it — badly. To cut the cost, you can get it through Setapp and receive extra tools like Get Backup Pro and Endurance.

If you want to dive more into macOS Catalina bugs fixed, check out the Reddit discussion.

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The safest place to get apps for your Mac is the App Store. Apple reviews each app in the App Store before it’s accepted and signs it to ensure that it hasn’t been tampered with or altered. If there’s ever a problem with an app, Apple can quickly remove it from the store.

If you download and install apps from the internet or directly from a developer, macOS continues to protect your Mac. When you install Mac apps, plug-ins, and installer packages from outside the App Store, macOS checks the Developer ID signature to verify that the software is from an identified developer and that it has not been altered. By default, macOS Catalina and later also requires software to be notarized, so you can be confident that the software you run on your Mac doesn't contain known malware. Before opening downloaded software for the first time, macOS requests your approval to make sure you aren’t misled into running software you didn’t expect.


Running software that hasn’t been signed and notarized may expose your computer and personal information to malware that can harm your Mac or compromise your privacy.

Unable To Verify Macos Catalina

The warning messages displayed below are examples, and it's possible that you could see a similar message that isn't displayed here. Please use caution if you choose to install any software for which your Mac displays an alert.

View the app security settings on your Mac

By default, the security and privacy preferences of your Mac are set to allow apps from the App Store and identified developers. For additional security, you can chose to allow only apps from the App Store.

In System Preferences, click Security & Privacy, then click General. Click the lock and enter your password to make changes. Select App Store under the header “Allow apps downloaded from.”

Open a developer-signed or notarized app

If your Mac is set to allow apps from the App Store and identified developers, the first time that you launch a new app, your Mac asks if you’re sure you want to open it.

An app that has been notarized by Apple indicates that Apple checked it for malicious software and none was detected.

If you see a warning message and can’t install an app

If you have set your Mac to allow apps only from the App Store and you try to install an app from elsewhere, your Mac will say that the app can't be opened because it was not downloaded from the App Store.*

If your Mac is set to allow apps from the App Store and identified developers, and you try to install an app that isn’t signed by an identified developer and—in macOS Catalina and later—notarized by Apple, you also see a warning that the app cannot be opened.

If you see this warning, it means that the app was not notarized, and Apple could not scan the app for known malicious software.

You may want to look for an updated version of the app in the App Store or look for an alternative app.

If macOS detects a malicious app

If macOS detects that software has malicious content or its authorization has been revoked for any reason, your Mac will notify you that the app will damage your computer. You should move this app to the Trash and check 'Report malware to Apple to protect other users.'

If you want to open an app that hasn’t been notarized or is from an unidentified developer

Running software that hasn’t been signed and notarized may expose your computer and personal information to malware that can harm your Mac or compromise your privacy. If you’re certain that an app you want to install is from a trustworthy source and hasn’t been tampered with, you can temporarily override your Mac security settings to open it.

If you still want to open an app for which the developer cannot be verified, open System Preferences.*

Go to Security & Privacy. Click the Open Anyway button in the General pane to confirm your intent to open or install the app.

The warning prompt reappears, and if you're absolutely sure you want to open the app anyway, you can click Open.

The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app.

Macos Catalina Unable To Verify The Printer On Your Network

Privacy protections

macOS has been designed to keep users and their data safe while respecting their privacy.

Gatekeeper performs online checks to verify if an app contains known malware and whether the developer’s signing certificate is revoked. We have never combined data from these checks with information about Apple users or their devices. We do not use data from these checks to learn what individual users are launching or running on their devices.

Notarization checks if the app contains known malware using an encrypted connection that is resilient to server failures.

These security checks have never included the user’s Apple ID or the identity of their device. To further protect privacy, we have stopped logging IP addresses associated with Developer ID certificate checks, and we will ensure that any collected IP addresses are removed from logs.

In addition, over the the next year we will introduce several changes to our security checks:

Unable To Verify Macos Catalina

  • A new encrypted protocol for Developer ID certificate revocation checks
  • Strong protections against server failure
  • A new preference for users to opt out of these security protections

Macos Catalina Unable To Verify Account Name Or Password

* If you're prompted to open the app in Finder and you're sure you want to open it despite the warning, you can control-click the app, choose Open from the menu, and then click Open in the dialog that appears. Enter your admin name and password to open the app.