Mid 2012 macbook pro ssd how to reinstall how to#

How to download and install old versions of OS X on a Mac. Speaking of which, if an old version is what youвЂ™re looking for, it may be worth taking a look at another article where we focus on that entirely: There is also the even trickier business of installing a clean copy of an older version of macOS on your Mac (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 weвЂ™ll run through below) the methods depend on the version of macOS that you are running.

Use the new Erase All Content and Settings option setting in System Preferences (available if you are running macOS Monterey on a M1 Mac or an Intel Mac with a T2 chip).

Use macOS Recovery to reinstall macOS 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.

Should this happen you will have to reinstall the system.ДЄs we explained above, there is more than one way to wipe your Mac and reinstall macOS: 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 recognised by the startup process since the seal will now be invalid.

Mid 2012 macbook pro ssd how to reinstall software#

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

And snapshots cannot be changed, even by the system itself. For further security, these Macs also do not start directly from the system volume, but from a snapshot of the system. This seal is stored either in the T2 chip of the newer Intel Macs or in the Secure Enclave of the Apple M1.Д®ach component of the system is signed in hierarchical order, and any change to a component would also invalidate the seal that represents the top level.

Since macOS Big Sur, macOS has its home on its own volume, which is both read-only and cryptographically signed and sealed (referred to as a Sealed System Volume). In the past it was helpful to reinstall the system if you wanted to correct some Mac problems, but today this solution doesnвЂ™t make as much sense.