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User profile for user: JazzJunkie
JazzJunkie Author
User level: Level 1
48 points

Apple 30 Cinema Display Resolution issue with High Sierra

My Apple 30" Cinema Display native resolution (2560x1600) is no longer an option with High Sierra. I'm assuming that Apple has chosen not to support this legacy hardware with the current OS. (highest res available is 1280x800).


Anyone know of a remedy for this issue? (other than buying g a new monitor)


I was talking to an Apple Support Tech today about an iPhone issue. My monitor was working perfectly. He suggested I reset the NV RAM. After THAT reset, the monitor resolution became an issue. I was still running Sierra 10.12.6 at that time. The tech then suggested that I upgrade to current High Sierra -which did not resolve the monitor issue. A senior tech suggest that I replace the Mini DisplayPort To Dual-link Adaptor, which I did today. No improvement.


There seems to be no available firmware update to this monitor. I would prefer not to have to purchase a new monitor at this time -IF there is a software fix to the issue. I suspect that I'm not the only 30" Cinema display owner with this issue. Does anyone know of an option to restore 2560x1600 resolution to this legacy device?


(I am now running High Sierra 10.13.15 on Late 2013 Mac Pro, with Apple 30" cinema Display)


Thanks

Mac Pro, macOS Sierra (10.12.6), 3.5GHz 6-Core Xeon E5 16GB DDR3

Posted on Jun 25, 2018 6:45 PM

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User profile for user: Eau Rouge
Eau Rouge
User level: Level 8
42,596 points

Posted on Jun 25, 2018 9:40 PM

High Sierra should support your displays resolution of 2560x1600. Normally in System Preferences> Displays> Display the Resolution should be set for Default for this Display. To see all available resolutions for your monitor press and hold down the option/ alt key whilst clicking on the Scaled button.

If your display is not operating at its optimum resolution try rebooting your Mac in Safe mode.

macOS Sierra: If you changed your display’s resolution and now there’s no picture

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User profile for user: Eau Rouge
Eau Rouge
User level: Level 8
42,596 points

Jun 25, 2018 9:40 PM in response to JazzJunkie

High Sierra should support your displays resolution of 2560x1600. Normally in System Preferences> Displays> Display the Resolution should be set for Default for this Display. To see all available resolutions for your monitor press and hold down the option/ alt key whilst clicking on the Scaled button.

If your display is not operating at its optimum resolution try rebooting your Mac in Safe mode.

macOS Sierra: If you changed your display’s resolution and now there’s no picture

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User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
133,273 points

Jun 26, 2018 8:46 AM in response to JazzJunkie

Safe mode takes defaults for as many settings as it can. This can even allow you to recover when screen resolutions are set beyond what the screen can actually produce. But one more step is needed.


Deliberately change the settings to what you want them to be in Regular Mode, and save changes and close the Preference pane. These changes will then "stick" in regular mode.

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Apple 30 Cinema Display Resolution issue with High Sierra

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