Downgrade mac os big sur mac#
If you’ve tried everything but your Mac is still experiencing serious malfunctions that make it unusable, you should try erasing the startup disk entirely. Step 5: Erase your Startup Disk if necessary
The good news is that your files and apps - unless corrupted - should be saved and ready after your Mac is done. When your Mac starts reinstalling MacOS Catalina, it’s going to take an hour or two to finish, so stay patient. Apple has specific instructions for this process, which is not complicated but will require a 12GB flash drive to work. If your only option is to reinstall Big Sur, you will need to create a bootable installer with MacOS Catalina instead, and use it as a startup disk.If you have a Mac that is only a year old or so, this should be MacOS Catalina, which fixes your problem. This should make sure the Reinstall option is set to the version of MacOS that your Mac came with. First, try starting up in Recovery mode again, this time using the Alt + Command + R keys.If Big Sur is already installed and you’ve been using it, it may just get reinstalled again - which isn’t what we want. Important note: This process is effective if Big Sur is having trouble booting up after a buggy installation. If your Mac is having trouble connecting to Wi-Fi, you may need to run an Ethernet cable from your router to your Mac for a wired connection. Your Mac will then search for an internet connection, which is required for the reinstall process. Select Continue, and enter your Apple ID. Back out to MacOS Utilities, and this time choose the Reinstall MacOS option. If you haven’t been using Time Machine and don’t have any backups, there’s still another option you can try. Step 4: Use the Reinstall MacOS option as an alternative You may be asked to choose categories of information to restore - if so, simply choose all of them. Then select Restore, and choose Continue when prompted. If a copy looks like what you need, select it, and select a destination disk where the backup will be stored. You will want a Time Machine backup from just before you installed Big Sur. If your Mac does return a Time Machine backup, take a look at what operating system it is and the date of its creation. If you aren’t sure if you set Time Machine to make regular copies, let your Mac search and see what it finds. Here’s where things get a little tricky: If you know you have a Time Machine copy and it is stored on an external hard drive, you need to plug in that external drive before choosing this option. Start by selecting this option, then choosing Continue, and your Mac will search for any Time Machine copies of your OS. The first option should be to Restore from Time Machine Backup. Step 3: Look for a Time Machine backupĮxamine MacOS Utilities. Note: If you have a Mac with an Apple silicon chip, pressing and holding the power button should take you to a startup menu, where you should choose Options instead.
You will know this worked if you see the window called MacOS Utilities appear.
Now release those keys, and your Mac should enter Recovery mode. When your Mac is powering up, immediately press and hold the Command and R keys, until you see the Apple logo appear.
Then press the power button to turn it back on. When your Mac is off, disconnect any accessories except for your mouse and keyboard. If a bug pops up and freezes your Mac during this process, hold down the power button for several seconds to force a shutdown. Your Mac may take a while to fully shut off. You can either press the physical power button or select the upper-left Apple icon and choose Shut Down to begin.
Downgrade mac os big sur full#
Step 2: Shut down and enter Recovery modeĬlose all your apps, and complete a full shutdown for your Mac. Oh, and if you’re on a MacBook, this is also a good time to plug your Mac into a power source and set up where you can stay for a while. If you have lots of iCloud space, you can also store all important files in iCloud for easy retrieval if necessary. Is macOS more secure than Windows? This malware report has the answerĪn external hard drive comes in very useful here.
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