Thanks Peter, I followed your procedure, however the internal master drive now named OSX Base System is locked. There’s no obvious way to unlock and instal MacOS this way. By restarting using the backup external drive I can see OSX Base System drive as completely empty and First Aid read AOK. Can I unlock it somehow using Disc Utility? In a folder marked System sub folder CDIS there are possible ways to unlock and instal OSX, but I’m wary of trying without some more advice. Cheers Marcus
Marcus Harris 75 Apple iPhone7 > On 2 Nov 2018, at 7:34 am, Peter Hinchliffe <[email protected]> wrote: > > > >> On 1 Nov 2018, at 6:41 pm, Marcus Harris <[email protected]> wrote: >> >> Hello Wamugers, >> This has possibly been answered before, if so please repeat again. >> Without taking proper care I seem to have semi- installed Mojave on my iMac >> which is limited to operate on High Sierra. >> I have OS 10.13.6 on a back up start up disk, so I have been able to use >> that to get my iMac running. >> How may I reinstall OS 10.13.6 on the internal HD, which is now known as OSX >> Base System and devoid of any installed software? >> I have a separate HD which is the Time Machine. >> It’s a 2009 dual core iMac with 8Gb Ram >> Many thanks in advance >> Marcus Harris 75 >> Apple iPhone7 > > Assuming that your Time Machine is up-to-date, and that it is still in good > nick, ie, not corrupted by the damaged Mojave installation, you should be > able to re-start your Mac using Shift-Option-⌘-R. This will install the MacOS > that originally came with your Mac, or the closest version still available. > You should then be able to use Migration Assistant to restore your Mac by > recovering from your Time Machine. > > This could well be a lengthy process, and your OS may be updated several > times before it gets underway, so you have to be sure that you can be around > to answer the various prompts that appear while this happens, but eventually > you’ll be able to walk away and leave it to its own devices until it finishes > the restoration. > > Kind regards, > > Peter Hinchliffe Apwin Computer Services > FileMaker Pro Solutions Developer > Perth, Western Australia > Phone (618) 9332 6482 Mob 0403 046 948 > -------------------------------------------------------------------- > Mac because I prefer it -- Windows because I have to. > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
