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#Install macos catalina from usb mac os

After the installation is complete, shut down your Mac and then restart it using the USB drive again. These are perfectly normal and are part of the installation process created by the developer to ensure compatibility.ĩ. During this process, you may see some command line messages. The next step will use the "Reinstall macOS" option to begin the installation process. This step is required if you want to update from a very old macOS version that does not support APFS.Ĩ. When you boot into the macOS recovery environment, make sure to use Disk Utility to format the internal drive (the drive used to install macOS Catalina) to APFS. Mac Pro, iMac, MacBook Pro, and Mac Mini 2006-2007ħ.

However, even the Patcher tool does not support the following Macs:

Early 2009 or newer Mac Mini or white MacBook.

Late 2008 or newer MacBook Air or aluminum all-in-one MacBook.

Early 2008 or newer Mac Pro, iMac or MacBook Pro.

With the macOS Catalina Patcher tool, you can install operating systems on the following Macs: Officially, macOS Catalina is only supported on the following Mac models as they have a graphics processor that supports Apple Graphics API Metal.

Back up your data on the Mac where you want to install Catalina.įinally, please note that this process depends on patches and hacks, and you may still experience issues running macOS Catalina without any errors on unsupported old Macs.

#Install macos catalina from usb mac os

The drive should be at least 16GB in size and formatted in Mac OS Extended (Journaled) format.Access a Mac that can be used to download and create a bootable USB installation drive.