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Yeh I could try it on my Ivy Bridge system but that's tied up at the moment.

I flashed a UEFI GOP to the VBIOS as mentioned in the OC config guide. But that makes no difference as I guess the motherboard BIOS is not UEFI.

I have a work around but it's not ideal.
The work around is to use Sierra 10.12 drivers (attached).
It's not ideal. Two issues: (a) OS Updates kills these drivers (of course) and have to re-install them (via Screen share from another Mac). (b) quick view (in Finder) does not always work as the file contents are displayed as a red screen.

Ah well. Time to give up. High Sierra was used occasional for a couple of Apps that don't work in Catalina+

[QUOTE="MacNB, post: 8833, member: 8626"] Yeh I could try it on my Ivy Bridge system but that's tied up at the moment. I flashed a UEFI GOP to the VBIOS as mentioned in the OC config guide. But that makes no difference as I guess the motherboard BIOS is not UEFI. I have a work around but it's not ideal. The work around is to use [B][COLOR=rgb(243, 121, 52)]Sierra 10.12 drivers[/COLOR][/B] (attached). It's not ideal. Two issues: (a) OS Updates kills these drivers (of course) and have to re-install them (via Screen share from another Mac). (b) quick view (in Finder) does not always work as the file contents are displayed as a red screen. Ah well. Time to give up. High Sierra was used occasional for a couple of Apps that don't work in Catalina+ [/QUOTE]

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