DOWNGRADE MAC OS SIERRA PASSWORD
DOWNGRADE MAC OS SIERRA DOWNLOAD

Basically you have several options for installing a macOS: Now you need to think about which macOS you want to use on your computer instead of macOS Catalina.

DOWNGRADE MAC OS SIERRA DOWNLOAD

Download macOS Mojave or earlier in advance

DOWNGRADE MAC OS SIERRA PASSWORD

At the menu bar, click Utilities → from the drop-down menu, select Startup Security Utility → enter either the login password, Apple ID password, or a firmware password if prompted → in the External Boot section, select Allow booting from external media to enable options of the macOS installation for the next steps.ģ. When you see the utilities window, release the keys.

As soon as you see the Apple logo on the screen, press and hold the Command + R keys until the computer boots into Recovery Mode. So, click on the Apple menu and select Restart.

If you have the T2 chip, you need to restart your Mac into Recovery Mode to continue to downgrade macOS.

To ensure that you have a T2 controller, press and hold the Option key and click on the Apple menu → from the drop-down menu, select System Information → in the sidebar, choose the Controller (or iBridge) section → if you have the chip, you will see Apple T2 chip in the Controller Information on the right.

If you have one, take the following steps:

This refers to the iMac Pro, and the MacBook Pro, MacBook Air, and Mac mini models released in 2018 or later. The next step is to check if your Mac has the Apple T2 Security Chip. To make a backup of the information stored on the disk, you can transfer it to an external hard drive or cloud storage like Dropbox, Google Drive, OneDrive, and so on. This is because the next steps include erasing your HD.

Even more important is to save your data if you have not already made a backup before installing macOS 10.15. While using macOS Catalina, you have probably created several files, which you want to save. The first thing you should do is to make a backup of your data. Check if your Mac has the Apple T2 Security Chipĥ. We will tell you at what step it will be necessary to connect to a hard drive with a backup or macOS installer.Ģ. It is advisable to disconnect all additional external devices. Your computer must be connected to a power source and have a stable internet connection.

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