Is this a dual display setup, like a laptop + external monitor?
In that case it's very likely a bug that seems to happen occasionally (but not for everyone) - where ACR is using the wrong display profile. It's using the profile for the main display even when the application is on the secondary display.
This has been reported many times here, but still no official word from Adobe. A workaround is to swap main<>secondary display assignments in the OS.
If it's a single display setup, the display profile is defective. This can affect applications differently. Make a new one, and make sure i1P is set to produce version 2 matrix-based profiles - not version 4 and/or table-based. The latter two are known to be problematic in some scenarios.
Thank you for your thoughtful reply. I am using a desktop computer with a dual monitor setup, yes, but the second monitor is not being used in this situation. It is fully powered off and has its own separate color profile created by i1P. The secondary display is rarely used for anything. Photoshop is being used on the main display (a Dell 30") and so the secondary display doesn't even come into play here. Also, the colors are fairly consistent across the two monitors if I were even to turn on the second monitor (an old 24" Apple Cinema display).
I can try making a new color profile with i1P, but I am not sure the profile is defective either. The profile seems to be doing the job correctly in PS. It is just ACR that has the problem.
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Yes, but the profile is still active if the unit is detected by the OS.
The display profile is loaded by the application on startup. It just uses the profile it's given by the OS - and if ACR reports the wrong display to the OS, then it's given the wrong profile.
Disconnect the Apple display entirely, and make a new profile. Then check again.
Great, thank you, that seems to have done the trick. Good advice. I unplugged the Apple display from the graphics card, then I ran i1P, created a new profile for the Dell monitor, then I opened Adobe Bridge, and brought a Raw file into ACR and all looks good now I think.
By the way, I checked my i1P settings that I have always been using and and for the ICC Profile Version I have been using Version 2 and not Version 4 and for Profile Type I have been using Matrix Based and not Table based. So no mistakes were made there. So that was all correct already.
At this point is there any way I can reconnect the Apple monitor and have things still work correctly, or is this not an option at this point?
OK, good. Then we know that is indeed the problem.
I've only used single-display setups lately, so I can't test or reproduce anything here. But I would think that if ACR is on the main display, as seen by the OS, it should work. That's what others have reported.