#Reinstall macos catalina how to#
#Reinstall macos catalina install#

Apple has another useful piece on this here – Apple | How to create a bootable installer for macOS.

#Reinstall macos catalina install#

You can speed up the download of the OS install media if you are repeating this process with the use of an Apple Caching Server, something I would recommend for any Apple Admins with a reasonable macOS and/or iOS deployment.Īnother option is to create a bootable USB installer drive to save on the download. This process will then download the version of the OS install media required and, depending on which boot up options you selected above, will run through the installation.

Proceed through the OS installation as normal.

Launch Disk Utility, select the correct volume and erase this (Apple also has a great knowledge base on this – Apple | How to erase a disk for Mac).

Booting to the recovery partition by holding down Command+R at boot up (more options are available and Apple has detailed these here – Apple | How to reinstall macOS from macOS Recovery).The first, and most commonplace, is the GUI or manual method which involves the following steps: In this post, I will explore a few of the methods available. What you may not realise is there are as many ways to perform an erase and install as there are reasons to do it. Perhaps you need to move it to a totally different management solution, or perhaps you have no option but to perform a full wipe to resolve an issue. Perhaps you are wiping the device to switch it between users or roles. There are many reasons you may wish to wipe and reinstall macOS on a device (sometimes known as a ‘nuke and pave’). Loss Protection – Insider threat solution for securityĬybersecurity – Zero-day malware protection for your Mac

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