Installasjon of mojave stops on a MacBook air... how can i reset?
the installation stops - and will not continue. So nothing works.... how can i set back to the old version?
thanks for answering :-)
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Restart your computer holding Command R to restart in Recovery. At this point, if you have a recent backup you have two choices: 1) download Mojave now and install it, then use Setup Assistant to copy your account(s) and applications or 2) restore using TimeMachine which will return your computer to its state before you attempted installing Mojave.
If you don't have a backup things may get a big ugly.