- How To Reinstall Macos Catalina
- Reinstall App Store Mac Catalina Download
- Reinstall App Store Mac Catalina Os
- How To Reinstall Macos Catalina From Scratch
Make your Mac invincible
- It usually happens when app store updates stuck in OS 10.15 but there may be some other issues too. Luckily, we have several tips to fix frozen app store issues on macOS 10.15. Let's learn its causes first. Well, technology is a blessing but sometimes it may give you a headache, just like the frozen app store.
- Here’s how to reinstall an application from the Mac App Store: Open the App Store application. (It’s on the Dock, or in the Applications folder.) Hold down the Option key and click Purchases. An Install button appears next to the missing application, as shown below.
Apple allows anyone with an Apple ID to install apps they’ve built themselves onto their devices for testing. AltStore uses your Apple ID to communicate with Apple's servers on your behalf and perform the necessary steps to prepare your account for installing apps onto your device. 1.Command + R and format App Disk 2.Shift+Option+Command+R. Posted 1 year ago. Copy RayKai answer. Share this post. Copied to Clipboard. Up vote reply of RayKai Down vote reply of RayKai. Try to reset your fusion drive that should Solve your trouble with downgrading to mac mojave.
Recently switched to macOS 11 Big Sur? This means you’re in for some huge enhancements and a completely redesigned look. It's fair to say Big Sur is not a perfect fit for everyone, though. Can you go back to previous macOS if that's the case? Sure. In this article, we describe how to downgrade from macOS 11 and continue using your previous macOS without any data loss.
Toolkit for safe macOS downgrade
Easily switch between macOS versions with Setapp. Get access to the apps that will keep your Mac invincible and your data protected.
Before you make a decision to uninstall Big Sur, check out some common macOS 11 problems and fixes. Maybe, the problem that is hampering your flow is on the list — and you can easily solve it. Also, if your Mac runs macOS Big Sur beta, you should know the public version available starting November 12 fixes most of the problems.
If you go like 'All right, thanks, just tell me how do I uninstall Big Sur from my Mac' — fair enough. The good news is it's easy to roll back macOS update. Follow the guide below.
How to downgrade from Big Sur step by step
Just to clarify the process a little bit, a downgrade from Big Sur covers five important steps — from backing up all the files you've acquired since upgrading, to restoring those on macOS Catalina. There are a few tools you'll need to use to downgrade safely: Primarily, a backup utility (Apple's native Time Machine or a more advanced third-party app like Get Backup Pro) and CleanMyMac X for keeping things tidy. Now when you're all set, let's get into it.
Best backup app for Mac
Before you roll back to the old macOS, create a secure backup of all your data with Get Backup Pro. So that there’s nothing to lose.
1. Backup your data (pretty please)
Even if you've just recently upgraded and haven’t managed to accumulate lots of data on macOS Big Sur, don’t skip this step. Downgrading means you erase everything from your hard drive. So whatever you’ve been working on since installing macOS 11 will be gone. Make sure you avoid the trouble and create a quick backup. You can do this with Time Machine, but we recommend Get Backup Pro for creating a bootable backup. This will give you an exact copy of your drive, with all saved settings — so that you can pick up where you left off.
Here’s how to back up data before you uninstall Big Sur:
Open Get Backup Pro from Setapp
Hit the plus button at the bottom to create a new backup
Name your backup project
Pick a backup destination and customize settings if necessary
Choose files, folders, and apps data you want to add to the backup
Hit Start.
It’s a good idea to use CleanMyMac X for a system cleanup before you create a backup. This way, you’ll avoid backing up unneeded files and duplicates, and therefore run a smooth and quick backup process. Plus, the app is generally a good tool to keep at your fingertips to remove any clutter. Believe me, your Mac has a lot of it. Here’s how CleanMyMac X works:
Open the app and hit Scan
Wait for CleanMyMac X to finish the scanning process
Hit Run if you want to remove all the junk, or Review if you want to select the files that should be deleted manually
That’s it! You’re all set for a clean backup.
2. Install macOS Catalina on a bootable drive
It might seem a bit counterintuitive, but you have to install macOS Catalina on an external drive before you erase Big Sur. This requires some Terminal work, which we’ll guide you through in a minute. Before that, make sure your Mac can boot from external media.
Allow booting from external media on new Macs
If you own a MacBook Air, MacBook Pro, or Mac mini with the T2 security chip (2018 models and newer), you might experience problems with booting files. To avoid this, you should allow booting from external media before you run downgrade to Catalina:
Restart your computer and boot in Recovery Mode (hold down Command + R once the Apple logo appears)
Access Utilities > Startup Security Utility
Enter your firmware password (note that this is the password you used to enable Startup Security Utility and it’s different from your admin and Apple ID credentials)
In External Boot, check the box next to “Allow booting from external media.”
Once you’re all set, it’s time to get Catalina back. First, download macOS Catalina from the Mac App Store, the usual way. While installers of the latest macOS versions are available only before the official release of the new one, you should do this as early as possible.
Then, install macOS Catalina on an external drive. Start with formatting the drive (you can skip this step if you have a formatted drive):
Get an external drive with minimum 12GB of free space
Connect it to your Mac via USB
Open Finder > Applications
Navigate to Utilities > Disk Utility
Click Erase next to your drive (make sure you name it if you have more than one)
Select APFS or macOS Extended format > Erase.
Install macOS Catalina on a formatted drive:
Open Finder > Applications
Launch Terminal from Utilities
Type the following command
sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia--volume /Volumes/MyVolume
Note that “MyVolume” in the command above is the name of your drive, so you should change it accordingly.
How To Reinstall Macos Catalina
Click Enter/Return
Confirm your action by entering the admin password > Y
Click Return
Once Terminal says “Done,” you can quit it and eject the hard drive.
3. Remove macOS 11 from hard drive
Now is the time for goodbye. Here’s how to downgrade from Big Sur to Catalina by removing macOS 11 from your hard drive:
Click on the Apple logo and select Restart from the menu
Hold down Command + R to reboot in Recovery mode
Open Disk Utility > Continue
Select your Startup Disk > Erase
Select APFS or macOS Extended format and confirm your action.
4. Reinstall macOS Catalina on your Mac
Next thing, run a downgrade to Catalina by reinstalling it on Mac:
Make sure your Mac is connected to the internet
Connect your bootable external drive
Click on the Apple logo and select Restart from the menu
While your Mac restarts, hold down Option
Once the list of startup disk options appears, select the bootable drive with macOS Catalina installer
Hit Continue, agree to the licensing terms, and wait for macOS Catalina to reinstall.
5. Restore data from backup
The last step is to bring back all the data you’ve compiled since upgrading to Big Sur. Again, a backup is essential since it will help restore both your files and saved settings. You can restore everything with the same tool you’ve used previously to create a backup.
Here’s how to restore a Time Machine backup:
With your Mac connected to the internet, restart the system
Hold down Command + R to enter Recovery
Access Utilities > Restore from Time Machine Backup > Continue
Select the backup source > Continue
Select your backup > Continue
After Time Machine restores data from the backup, your Mac will reboot.
If you used Get Backup Pro for your backup, restoring data is even easier. All you have to do is launch the app, select your backup from the list, and hit Restore. Select a custom location for your files and once again click on the Restore button. That’s it. All your data and settings will be back on macOS Catalina in a minute.
That’s about it. Whenever you’re wondering how to go back to previous macOS, you can use the guide described above. All the instructions are pretty universal, except you should adjust the Terminal command when installing old macOS on a bootable drive.
In case your Mac is slowing down or else behaving strangely after the downgrade, we recommend to get iStat Menus for advanced system performance monitoring. This app will help you understand the source of the problem — whether it’s login items, network problems, or disk activity — and fix them accordingly.
iStat Menus is available on Setapp, along with the useful utilities like CleanMyMac X and Get Backup Pro. So you can use it all from one place for 7 days free. Hopefully, this toolkit will help you with how to downgrade macOS Big Sur, as well as keep your Mac in perfect shape, anytime.
Best apps live in Setapp
Apple is ready to give you a change — the all-new macOS Catalina, available as a free download — so let’s get you all set.
There are two different options on how to upgrade. You can install Catalina over your current macOS, keeping all its data untouched. Or, you can get a fresh start with a clean install. The main benefit of clean installation is that you get rid of the system junk and leftovers which might hamper your Mac’s performance.
Reinstall App Store Mac Catalina Download
Get Setapp to get ready for Catalina
A complete toolkit of utilities that prepare your Mac for macOS Catalina install. Upgrade your Mac in minutes without losing any data.
One way or another, getting Catalina on your Mac is definitely worth a try. Look at the bells and whistles it brings along:
- A renewed iTunes experience — with dedicated apps for Music, Podcasts and Apple TV.
- Simplified porting of iOS apps to macOS.
- Sidecar for using your iPad as an additional screen.
- Major updates of your favorite native apps, including Photos, Reminders, and Find My.
And that’s only a small part of your new macOS experience. If you need more reasons, find a complete review of the new Catalina features here.
Prepare your Mac for the clean install
If you’ve seen the new Catalina, you must be excited to get your hands on the installer — we get it. But don’t dive right into the upgrade. Your Mac has to be ready. First thing, check device compatibility. The rules are not much different from the Mojave compatible Macs, except for a few older Mac Pro models that Catalina will no longer support. Here’s the full list:
- MacBook Air (2012 or newer)
- MacBook (2015 or newer)
- MacBook Pro (2012 or newer)
- Mac Pro (2013 or newer)
- Mac mini (2012 or newer)
- iMac (2012 or newer)
- iMac Pro (all models)
Found your Mac on the list? Congrats, you’re on the Catalina team. Just a few more things and you’re ready to install:
- Get a USB drive with minimum 16GB of free space if you plan to install Catalina on a startup disk.
- Backup your data and clean away all the clutter.
- Note that it will take your Mac an hour or two to run the upgrade.
Choose your way to clean install Catalina
As we’ve said before, the healthiest method of clean installing the new macOS is by putting it on your startup drive. It’s your perfect choice if your Mac has a single non-partitioned drive where all the files are stored. Simply backup an entire drive and go ahead with the installation.
Another choice would be to test Catalina on a non-startup drive. If you have a spare drive or your startup drive is divided into volumes, this might be a good option to explore. Especially if you don’t want any files to go away.
Let’s dive into the details of clean installation.
Clean install macOS 10.15 on a startup disk drive
Again, this is the recommended option that will leave you with a high-performing Mac. It involves lots of cleaning and securing your files, though. You can take care of all the data stored on your old OS manually, or by using a few easy utilities. Let’s save your time and see how to do it real quick:
Remove junk from your Mac with CMM X
Download a powerful macOS cleaner to get ready for the Catalina upgrade. All the junk, leftovers and old caches will be gone in a moment.
Step 1. Get rid of the junk
Every ancient app leftover that is hiding somewhere in the depths of your Mac may potentially hinder its performance. That’s not what you want. CleanMyMac X can handle the junk before an upgrade. In one smart scan, the app will spot and remove everything — from outdated caches to file duplicates.
One more important detail, Apple will stop supporting 32-bit applications in the new macOS 10.15. So make sure you get rid of them, too. This will help you see the functionality that Catalina will be missing, and find the right alternatives in advance. In CleanMyMac X, navigate to the Uninstaller tab, filter apps by 32-bit, and click Uninstall. As easy as that. Find out what to do when scratch disks are full in photoshop.
CleanMyMac X is a nice utility to keep on your new macOS, too. In fact, it’s the quickest way to refresh an entire system and remove potential threats before they start affecting your performance. The app is available on Setapp — and so is the backup utility for your Mac we’ll talk about in a moment.
Step 2. Backup your drive
You want the redundant files to go. But you also want the needed files to stay. That’s easy with Get Backup Pro, one of the best backup apps for Mac. Unlike Apple’s native Time Machine, Get Backup Pro has the functionality of creating bootable clones — which gives you absolute peace of mind. In case there’s a tech problem with your Catalina installation, the drive can be recovered at any time.
We encourage you not to ignore the backup process. It will help you roll back at any time with minimum loss. Plus, it’s an easy way to move your files to the new OS in batch.
Read more information about Mac update
Step 3. Create a bootable Catalina installer
Before you clean install Catalina, we have to warn you there might be no going back. First, because macOS 10.15 is truly great. Second, because Apple removes an old macOS installer from the App Store once the new version is out. So if you want to have an exit plan, you’ll have to download Mojave installer in advance.
Here’s how you create Catalina installer:
- Access the App Store and get the new macOS Catalina.
- Wait for the download process to finish and click File > Quit as soon as the installer launches. Your installer will be stored in the Applications folder.
- Connect your USB stick and go to Disk Utilities.
- In the Erase tab, select Mac OS Extended (Journaled) as your format.
- Name your USB stick and then click Erase > Done > close Disk Utility.
- 6. Access Terminal and type the following command (make sure you replace [XXX] with your drive name):sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/[XXX] --applicationpath /Applications/Install macOS Catalina.app
- Hit Return and type in your admin password.
- When the process is finished, click Done and close Terminal.
- Congrats, you’re a Catalina user — now officially.
Step 4. Get Catalina on your startup drive
Reinstall App Store Mac Catalina Os
The final part. Your data is securely backed up, so you can go ahead and erase your startup disk drive:
- Access System Preferences > Startup Disk and choose your Catalina installer.
- Restart your Mac and hold Command-R.
- Connect your bootable USB.
- In the macOS Utilities window, click Reinstall a new copy of macOS.
- Click Continue and agree to the terms and conditions.
- Select your startup drive and click Install.
Once the new macOS gets on your Mac, it will be born anew. So yes, you will have to set it up — just like a new Mac. If you’ve used Setapp on the old macOS, you can quickly get your apps back by downloading the installer on setapp.com.
Clean install macOS 10.15 on a non-startup disk drive
If you don’t have a free, non-partitioned drive, you can install Catalina on a non-startup drive. Here are three easy steps:
Step 1. Erase your non-startup drive
If you install Catalina on a new drive, this is not for you. Otherwise, you’ll have to wipe everything away from the drive before using it. Navigate to Disk Utility, select your non-startup drive, and click Erase. If there’s any data you want to keep, use ChronoSync Express to sync it with another drive.
Step 2. Download the Catalina installer
How To Reinstall Macos Catalina From Scratch
Access your Mac App Store > Updates and grab the installer. Once the installer will launch automatically, quit — you don’t want to install it from there.
Step 3. Install Catalina to your non-startup drive
You’ll find the downloaded installer in your Applications folder and launch it. Select a drive — you’ll have to change it from “startup” to your target one. Follow the instructions and finish your installation.
Once your system is upgraded, set up your new Mac and make sure you try all the perks. And before you get frustrated that your favorite 32-bit app is missing, get Setapp — it surely has a decent alternative.
If you are a true macOS fan, check out the comparison of iOS and macOS adoption trends below: