macOS Catalina is the next major operating system for Mac. If you mashed your fingers all over that install button before considering that you may not be ready for it, you can downgrade back to macOS Mojave. If you follow these steps you'll be back to your old setup in no time.
Note: If you are reading this article on the Mac that you want to downgrade on, switch to another device or print this page before continuing so you can read along as you go.
Important information for Macs with the T2 security chip
Dec 29, 2017 Late 2011 MacBook Pros shipped with Lion, so, as I said previously, they can't run Snow Leopard. They won't be able to boot from a Snow Leopard DVD. I don't know what you're referencing as the DVD that shipped with your Mac, because a Late 2011 MacBook Pro shouldn't have shipped with one. Since I tried to install Snow Leapord, my iMAC refuses to boot, even in safe mode. However, I found this post on the Apple website. It is from 2013, and it may be able to help you. The article also provides the update link from Apple Support. The post is 'OS X 10.4/10.5 need to upgrade, 10.6.8 ok still' and it is by a level 7 user DSStore. Aug 25, 2018 MAC OS X SNOW LEOPARD ISO: Software Information. Software name: Mac OS X Snow Leopard. Type of software: Offline/Standalone full Setup. Developer: Apple Inc.(Lone Author). Minimum System Requirements for Mac OS X Snow Leopard. Here are the specifications that you must have in order to gain access to this snow leopard. Mac computer with an. Nov 07, 2019 Restore the image of Snow Leopard since your hard drive to your USB drive: Now from the same application Disk Utility, (1) click on the USB memory is called Hackintosh, (2) you click restore. (3) Drag and drop the image created from the installation DVD Mac OS X Install DVD.dmg of the sidebar to the field that says Font, then (4) drag and drop the USB from the sidebar to the field that says. Jun 26, 2016 Download Mac OS X Snow Leopard 10.6 seventh major release is the Mac OS X Snow Leopard for the Macintosh Computers. It is marked as a major release because many of the features were enhanced and few new features were introduced in the desktop. Apple mainly focuses on Mac OS X Snow Leopard operating system speed and reliability. As a few modifications, It finally supports.
Before you try to use a bootable installer on your Mac if you have a 2018 or newer MacBook Pro, MacBook Air, or Mac mini, you may need to make sure to allow booting from external media before you attempt to downgrade. If you've enabled the Startup Security Utility, check to make sure you'll be able to use a bootable external drive. Here's how.
Jan 31, 2018 Snow Leopard was also the last version of Mac OS X to be sold on a disk – which you can still buy today! The Mac App Store wouldn’t debut until the latter half of Snow Leopard’s life cycle.
Note: You'll need the firmware password you used to enable the Startup Security Utility. This is different from your administrative password and your Apple ID. Make sure you know the correct password to access the Startup Security Utility before you begin.
Restart your Mac.
Hold down Command+R right when you see the Apple Logo. This will put your Mac into Recovery Mode.
Click Utilities in the Menu Bar.
Click on Startup Security Utility.
Enter your Administrator credentials.
Tick the box to Allow booting from external media.
Step 1: Back up your Mac
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This process will erase macOS Catalina from your hard drive entirely. That means any files, programs, or documents you've been working on while using macOS Catalina will also be erased if you don't back them up first. Use an external hard drive or a cloud-based program like DropBox, OneDrive, or iCloud. If you don't save these important files somewhere off of your computer you will lose them.
Step 2: Create a bootable drive of macOS Mojave
Before you erase macOS Catalina from your computer, download macOS Mojave from the Mac App Store. You'll need a copy of macOS Mojave on an external hard drive in order to downgrade from macOS Catalina.
Follow the steps linked below to make a bootable installer drive for macOS Mojave.
Note: Making a bootable installer requires the use of Terminal. If you don't feel comfortable making changes to your Mac with Terminal, you can create a bootable disk using the DiskMaker X program.
Step 3: Erase macOS Catalina
You'll need to erase your hard drive before re-installing Mojave. Remember, back up your Mac before performing this step.
Connect your Mac to the internet via Wi-Fi or Ethernet.
Click on the Apple icon in the upper left corner of the screen.
Select Restart from the drop-down menu.
Hold down Command+R, and keep holding the keys until your computer reboots. This will put your computer into Recovery Mode.
Click on Disk Utility in the OS X Utilities selector.
Click Continue.
Select your Startup Disk.
Click on the Erase tab at the top of the window.
Enter a name for the file to be destroyed (Like macOS Catalina or something).
If your Mac is using HFS+, select Mac OS Extended (Journaled) from the format list. If your Mac is using APFS, select APFS from the format list.
If Scheme is available, select GUID Partition Map.
Click Erase.
After the process is complete, quit Disk Utility from the drop-down menu in the upper left corner of the screen to go back to the OS X Utilities selector.
Step 4: Reinstall macOS Mojave
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After you have erased macOS Catalina, you will want to reinstall Mojave.
NOTE: If your Mac came with macOS Mojave, you can restart your Mac while holding down Shift-Option-Command-R to simply install the operating system that came with your Mac. Otherwise, follow the steps below to install Mojave back on your Mac.
Connect your Mac to the internet via Wi-Fi or Ethernet.
Plug the bootable hard drive you made with Mojave on it into your Mac.
Click on the Apple icon in the upper left corner of the screen.
Select Restart from the drop-down menu.
Hold down Option while your computer restarts. This will send you to the option to select a startup disk.
Select your bootable drive with macOS Mojave from the list of startup disk options. macOS Mojave will begin installing on your Mac.
Click Continue in the macOS Mojave installation window.
macOS Mojave will install like a standard update. You will agree to the licensing terms before the software reboots on your Mac.
Step 5: Restore settings from an earlier macOS Mojave Time machine backup
If you have a recent backup of your Mac saved via Time Machine (which you should), you can use it to reinstall the settings you have saved from macOS Mojave.
Connect your Mac to the internet via Wi-Fi or Ethernet
Click on the Apple icon.
Select Restart from the drop-down menu.
Hold down Command+R when you hear the startup chime and keep holding the keys until your computer reboots.
Select Restore from Time Machine Backup in the OS X Utilities selector.
Click Continue.
Click Continue after reading the important information about restoring from a backup.
Select the Backup source for where your Time Machine backup is stored.
Click Continue.
Select the most recent macOS Mojave backup on the drive.
Click Continue.
Your Mac will begin restoring from the Time Machine backup and then reboot. This process can take a while, so grab a cup of coffee while you wait.
If you run into any problems while trying to downgrade your Mac operating system, let us know in the comments.
Updated September 2019: Updated for macOS Catalina.
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