2/18/2023 0 Comments Macos high sierra won t installNow choose macOS Post Install and the required patches will be installed on your Mac so that Catalina can work.After the installation has completed, you should restart the Mac in Recovery mode again, choosing the drive that contains the bootable installer.Choose Reinstall macOS and wait for the new version of macOS to install.Choose the bootable installer drive and Enter.This will cause the Mac open in Startup Manager. Restart the Mac while holding the Option/Alt key.Plug the bootable installer into the Mac you wish to update.Choose ‘Create a bootable installer’ from the options.The download (of Catalina) will start – since it’s almost 8GB it is likely to take a while.The script is part of the patch for macOS Big Sur and changes important settings for booting and system files.Ĭatalina patch here. After preparing the Mac with the USB stick, start a terminal and enter “/ Volumes / Image Volume / set-vars.sh”. These can be found in the instructions for big-sur-micropatcher. In some cases, there are still tasks to be performed after the installation. Now install macOS from your bootable installer.Open a terminal window and drag and drop the file into the terminal.After extracting the archive from your download you will find the file “micropatcher.sh”.Click on the Code and Download Zip buttons. You can download that patcher we mentioned above from Next you need to obtain software that is able to trick the installation files of the version of macOS you want to install into believing that the Mac is compatible.How to create a bootable installer of macOS in a separate article. Now you need to load these installation files onto a USB stick and prepare the USB stick for installing macOS Big Sur.If they don’t show up in Software Update you can get the installation files from the Mac App Store. You’ll have to obtain these using a compatible Mac. First you will need to obtain the installation files for the operating system.The procedure for updating to an incompatible Mac to Big Sur is as follows: There’s a patcher for installing macOS Big Sur on older Macs available – theīig-sur-micropatcher can be downloaded from GitHub.Ĭheck that the patcher is compatible with your Mac – you should find this information on the patch page (linked above). Install Big Sur on an unsupported Mac is similarly tricky, but, again, this doesn’t mean that installing Big Sur on an older Mac isn’t possible. How to install Big Sur on an unsupported Mac However, you should not install these, but ideally again create a USB stick with the current installation files and install the update in this way. Once you have installed macOS Monterey (or whatever version you choose), updates will appear in Software Updates as soon as they are available. How to install macOS updates on an unsupported Mac Steps outlined here if you have any problems. Next you need to select Install macOS, you should see the option Install macOS Big Sur in the OpenCore Picker. When the Mac starts up there will be a black screen with a few drive options.Once that has been created you need to reboot your Mac while holding down the Option (Alt) key.(The recommendation is to install on a FAT32 drive. The next step is to choose Install OpenCore to USB/internal drive from the options.Once in Build OpenCore the process should quickly build and then you will return to the main menu.Choose Build OpenCore (unless you wish to run the patcher on a different Mac, in which case it’s Change Model).After extracting the archive from your download you will find the file “OpenCore-Patcher.app”.You can download the latest version of the patcher we mentioned above Next you need to obtain the patcher software that will essentially trick the installation files of the version of macOS you want to install into believing that the Mac is compatible.You’ll be able to find the installation files in Applications. Now you need to load these installation files onto a USB stick and prepare the USB stick for installing macOS Monterey. They are 12GB so expect this to take a while. If they don’t show up in Software Update you can get the installation files from the
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