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Regardless of which calibration system you are using, the calibration tables are stored in the monitor's LUT (Look Up Table). Only one calibration tool should use the LUT at any one time.
There is only one exception - if you have a very nice monitor (like an Eizo) that offers internal hardware calibration, then the calibration tables are in fact stored in the monitor itself, and all other LUT loaders should be disabled.
This article discusses how to manually specify which calibration tool
(software or hardware) will load its calibration table into your video
card at start-up and includes notes on disabling Adobe Gamma.
You don't have to do anything because LUT loaders are not used - simply go into System Preferences -> ColorSync and make sure the correct profiles are associated with each of your displays
Please Note: If you re-install Photoshop for any reason, Photoshop will re-install Adobe Gamma automatically and you must turn it off again!
You can either manually browse the Start Menu -> Programs -> Startup -> [Right Click] and choose delete to get rid off LUT loaders you don't need. Or far simpler and more explicit, you can use this free ultity to precisely control which programs run at startup:
(Simply install, go to your control panel, and choose the new 'Startup option'. You can then manually enable/disable any programs you like!)
If you re-install Photoshop for any reason, Photoshop will re-install
Adobe Gamma automatically and you must turn it off again!
You need to run the Windows Defender utility in your Control Panel and go to 'Startup Items' and disable or delete Adobe Gamma from there.