Originally Posted By: w
Would running macOSUpdCombo10.13.2.dmg work as a reinstall ?
No. Running the 10.13.3 Combo update might fix a few things but it’s not an OS reinstall.

You can

a) download the OS from the App Store and run that. Normally, this is easier and gets th job done

B) If you have to run Disk Utility before an OS reinstall, this is the way to go.: Hold the Option key while booting. Select the 10.13 Repair Partition and double-click or Enter. Once in the Repair drive, select Reinstall the OS from the menu. If you have a drive or partition running an earlier OS anywhere on your system, you will not be able to do this. If you see a Repair partition that shows an earlier OS and not 10.13, this will not work.

Neither method will erase your drive or damage your files but you do want to back up your system before doing either.


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