How to downgrade mac os from sierra how to#
How to downgrade mac os from sierra install#

If youвЂ™ve got a Time Machine backup and need to revert to an older version of the OS, read the next section. Then reformat the drive, at the end launch the OS installer. Tutorial on Downgrading macOS 10.13 High Sierra to 10.12 Sierra Part 1: Download Bootable Drive of macOS Sierra Part 2: Remove macOS High Sierra from Mac. If youвЂ™re running macOS Sierra, the network drive can use the SMB protocol older versions of macOS only support AFP for Time Machine backups. You can download the installer without installing it by quitting the. Once started go to the menu to launch Disk Utility and then delete all of the partitions and containers. If youвЂ™re one of those users whoвЂ™s having trouble with macOS High Sierra and decided youвЂ™d rather go back to macOS Sierra, heres how.Terminal Code:sudo /App. Before you upgrade to Mojave, download the High Sierra installer from the App Store. When the options appear on screen, choose.

How to downgrade mac os from sierra install#

Make sure you can actually install High Sierra on that iMac as Paul Conaway suggests. Use Mac OS Extended (Journaled) for the format. In Disk Utility, select 'Show all Devices' from the View popup menu.

If you have an M1 Mac you need to press and hold the on button until the. Once it boots, use Disk Utility to erase the internal drive on the iMac. If you have an Intel Mac hold down Command + R until the Apple logo appears. Plug your Time Machine disk into your Mac.

How to downgrade mac os from sierra how to#

Once you've created the needed drive, connect it and then restart the system pressing the Option (вЊҐ) key to get to the Startup Manager so you can select the thumb drive. How to downgrade macOS using Time Machine. Make sure to redo the format to GUID/HFS+ (Journaled) as the default is FAT32 on the thumb drives. How to create a bootable macOS Catalina installer drive.How to create a bootable macOS Mojave installer drive.How to create a bootable macOS High Sierra installer drive.How to create a bootable macOS Sierra installer drive.In our case you really should stick with Sierra: Pick the OS you want to use from this list. As an example I have 6 setup now (of course using the correct OS for the given system). First, create an OS installer drive, You'll want to use a USB-A Thumb drive with a USB-A to USB-C dongle (that way you only need one set of thumb drives for the different OS's you want to use and can be used on the different systems.