There is also the even trickier business of installing a clean copy of an older version of macOS on your Mac (Monterey, Big Sur, Catalina, High Sierra, Sierra, El Capitan, Mojave, Yosemite or an even old version of OS X). Not only are there three different methods (which we’ll run through below) the methods depend on the version of macOS that you are running. Use the Erase All Content and Settings option setting in System Preferences (available if you are running macOS Monterey and later on a M1 or M2 Mac, or an Intel Mac with a T2 chip).Use macOS Recovery to reinstall macOS via the web.

Make a copy of the macOS installer on a USB stick, reformat your drive and then install the macOS on to your Mac from the installer.

If you are happy to take the risk and still want to wipe your Mac and reinstall macOS – which you should definitely do if you are selling or passing on your Mac – read on! Three ways to clean install macOSĪs we explained above, there is more than one way to wipe your Mac and reinstall macOS: Again, the seal guarantees that everything is fine and that nothing untoward has crept in. All components are checked after installation, then signed and finally the entire system is sealed again. As long as your Mac works (which can be determined on the basis of the seal), the Mac is considered to be in working order as it complies with Apple’s specifications.įor that reason, even if you do encounter problems on Macs with T2 chip or Apple Silicon while running macOS it makes no sense to reinstall the system yourself.įor those who want to do a clean install so that no leftovers that belong to an old system are carried along, this no longer applies because none of this information is carried over. However, if your Mac boots up without issue then it indicates that there are no problems with the system. Should this happen you will have to reinstall the system. Should a problem occur with macOS during a restart, perhaps because a storage space on the SSD is defective and thus a system component is no longer intact, this will be recognized by the startup process since the seal will now be invalid.

So macOS itself cannot be changed by any software that you install as a user.

Instal the new version for mac MidEvil