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Make sure the GUID Partition Map is installed on your macOS. It is possible to format your computer using Mac OS Extended (Journaled), APFS, or GUID Partition Maps. If you have a brand-new SSD, you should format it using the Disk Utility app on your Mac. In order to reinstall Mac OS Catalina, I would need to get rid of the partitions. I’m not sure what I’m using (see images), so I can’t quite understand the partition (see images, I have no idea what Mac HD I am). I recently bought a used iMac 2017 and did not notice the SSD drive partitioned. Finally, click on the “Erase” button again to confirm. After that, click on the SSD in the left sidebar. Firstly, you need to connect the SSD to your Mac. How Do I Format A New Ssd For Catalina Mac?Ĭredit: If you want to format a new SSD for Catalina Mac, you can follow these steps: 1.

During the restore process, the data from the source drive is returned to the target drive. Clones have always been supported by the Disk Utility as long as they are referred to as Restore. It can be done as usual by starting Command-R on the same drive. It is also possible to create and restore a system image of your computer to a SSD. When you click Install Macos, the Utilities window will appear. Make the option to boot the computer as a bootable volume available.

Hold down the Option or Alt key until the bootable data volume appears on screen during startup. Here’s how to clone MacOS Catalina to an SSD. This will create an exact replica of your current system, which you can then boot from the new drive. If you want to move your MacOS Catalina installation to an SSD, you can do so by cloning your hard drive.