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.
