melcat Offline Upload & Sell: Off
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I ran across a post by one of the developers of the Datacolor software, in which he says they encountered bugs with the 32-bit calibration API on macOS, which don't occur with the 64-bit API. They have put in some workarounds in their 32-bit software which (only) mostly solve the problem. The bug has to do with profiles not "sticking" on login.
Therefore, if your puck is supported by the 64-bit software, it's advisable to update to it on macOS even if you don't intend to update past Mojave, even though Mojave can still run 32-bit software.
And, if what he says is true, it would be best to use a 64-bit build of DisplayCal too.
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