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macOS High Sierra (10.13) Unsupported Macs Thread
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Do you have a supported Mac to try it on and see what it says?
Another common mistakes that people do: don't forget to disable SIP and set nvram boot args="-no_compat_check".
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Works on a supported Mac.
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I've disabled SIP but let me go and try the NVRAM part. I wasn't aware of that.
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Do I type in exactly, "set nvram boot args="-no_compat_check"?
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Drop the set. From a recovery terminal you don't need to put sudo in front.
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Forgot s after check, so it it is "-no_compat_checks".
Just found this thread - https://apple.stackexchange.com/que...-args-with-nvram-gets-general-error-on-sierra
Maybe that command doesn't work anymore starting with El Capitan.
Strange. It works in Mojave and Catalina. I always knew that Mojave is better than High Sierra.
Looks like I was correct the first time, it is "-no_compat_check".
Yeah, won't work on this. Thank you for the help though! I re-downloaded High Sierra again and am about to try this one more time.
It looks like I found the problem - I needed to use a different flash drive. Smh.
I thought you said your flash drive actually worked on a supported machine?
I can't answer your question about specific GPU and wifi card support but I would say you should take a look at Dosdude's tool/site to see if your MP can have Mojave.
I say this because I had High Sierra running on my early 2009 iMac 9,1 using his tool and it was running well, had El Cap before that, but I finally took the plunge a while ago and clean installed Mojave and I have to say at least on this iMac Mojave is running better (faster and more stable) than HS. Not only that, but I've also regained features Apple had dropped support for in HS, such as Safari open tab sync across devices and the recent versions of Pages, Numbers and Keynote. Also having Dark mode is nice bonus.
And yes the whole operation using his tool is easy if you follow instructions carefully. Just make sure to see if your mac is supported for the specific macOS you're installing and look for known issues so you're not surprised by anything.
I finally swapped my old and small SSD with a much bigger one, cloning the old one on the new without problems. This had two side effects:
1) The recovery partition got cloned but doesn't boot anymore for some reason ("This version of Mac OS X is not supported on this platform" while booting in verbose!).
2) I have now enough free space to update from 10.13.4 to 10.1.6
I tried updating from the app store (which used to work until 10.4.4 many months ago) but it fails at reboot. I did download the combo update manually and read post #3,350 on how to modify it but I'm a bit worried to be left with an unbootable machine, especially as I no longer have a recovery partition and my USB install media failed long ago.
To complicate matters further, I don't have a flat internet connection, so i'd really prefer not to download the whole Sierra installer to recreate the recovery partition if possible.
My questions:
1) how to restore booting capabilities in the recovery partition manually? I've tried mounting BaseSystem.dmg and applying the patch from MacOS Postinstall but it crashes.
2) Is the procedure on post #3,350 safe or I need to worry about other steps?
1) The recovery partition got cloned but doesn't boot anymore for some reason ("This version of Mac OS X is not supported on this platform" while booting in verbose!).
2) I have now enough free space to update from 10.13.4 to 10.1.6
I tried updating from the app store (which used to work until 10.4.4 many months ago) but it fails at reboot. I did download the combo update manually and read post #3,350 on how to modify it but I'm a bit worried to be left with an unbootable machine, especially as I no longer have a recovery partition and my USB install media failed long ago.
To complicate matters further, I don't have a flat internet connection, so i'd really prefer not to download the whole Sierra installer to recreate the recovery partition if possible.
My questions:
1) how to restore booting capabilities in the recovery partition manually? I've tried mounting BaseSystem.dmg and applying the patch from MacOS Postinstall but it crashes.
2) Is the procedure on post #3,350 safe or I need to worry about other steps?
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Just installed the 002 sec. update yesterday on my Mac Pro 3,1 and now 003 is out. Anyone install this yet? All good?
Just installed 003 and the Safari update without any issues at all. The key is to use APFS on your OS drive. My guess is we will get one more update in August or September, as support for High Sierra ends in Sept.
![Screen Shot 2020-05-27 at 7.43.24 AM.png]( "Screen Shot 2020-05-27 at 7.43.24 AM.png")
Yea, probably will hold off on the APFS thing until I upgrade to Mojave which I’ll probably do this fall/end of year depending on when they stop with the HS sec. updates. Pretty happy with HS at the moment.
We might get 004 in late July, and 005 in late September when 10.16 comes out, like what happened with Sierra.
I can assure you there are no negatives to using it. All you need to do to switch over is do a time machine backup, then reinstall HS with the drive formatted with APFS, then restore from the time backup during the OS setup. The end result will be identical to a time machine restore. It will take you 1 hour total at most.
Using a standard time machine restore can be wonky on an unsupported system. At least in my experience.
My tests with Mojave on an external disk (mid-2009 MacBook5,2) have been OK on HFS+, albeit without a Recovery partition. (I just use my dosdude1 USB as a "recovery" if I need it.) I don't think APFS is an absolute requirement until Catalina. I expect to go to Mojave when High Sierra is done, staying with HFS as long as APFS support is iffy in Linux for BootCamp dual boot.
Just installed the latest Security Update on a 3,1 and now none of the non-Apple applications will launch.
Have you tried installing the post install again?
No, I have not because the system gives me circle with a line through it when I try to go to recovery partition and I cannot download the patcher tool again because the link is dead on the first page of this thread.
Edit: I found my USB drive with the patcher tool on it and ran the post install again. Everything seems normal again. Thanks!
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Well, the obvious negative - and the reason I'm not using it - is that you can't then access to your HS partition from an older OS.