I did try the “Upgrade to High Sierra” route via the App Store, but got the same results after an hour of installing: "macOS can't be installed on this machine”. What a hassle. It’s a core i5 2.7GHz 27” mid-2011 iMac, so it’s not like it’s an ancient machine or anything. Should be upgradeable, right?
Given that Sierra installs on it fine, but not HS, it could be the firmware issue. Is there a firmware upgrade available separately? I don’t see one on Apple’s downloads web page. -Carl > On Nov 14, 2017, at 10:45 AM, @lbutlr <[email protected]> wrote: > > On 13 Nov 2017, at 13:15, Carl Hoefs <[email protected]> wrote: >> But... I couldn't get the High Sierra installer to work, regardless. I had >> to install Sierra instead. This is on an iMac12,2. > > It seems that a new install of High Sierra needs to be done by running the > installer application in macOS. The firmware update that needs to be applied > to allow APFS booting seems to require this, and it's integrated into the > application, not the boot image. > > Not 100% sure on this, but machines that simply boot from a HS 10.13 > installer and have never had 10.13 on them don't seem to be able to install > properly. > > -- > Apple broke AppleScripting signatures in Mail.app, so no random signatures. > > _______________________________________________ > MacOSX-talk mailing list > [email protected] > http://www.omnigroup.com/mailman/listinfo/macosx-talk _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
