Can’t start just says “Display Cal already running”

[Anonymous]

Hi,
I’m running DisplayCal latest version on macOS Catalina 10.15.2 and when I’m trying to start DisplayCal it just says “DisplayCal already running” but that’s not the case.

I have tried to re-install it and also I have tried to reboot my MBP but it don’t work. How can I fix this?

[skeero]

I went through this last night and fixed it by creating a new user profile on my Mac, installing the software on there, and then once it’s loaded into your Color Profiles in System Preferences, I did a google search for where your profiles are stored (Library > ColorSync > Profiles), and then went into there and copy/pasted it on a thumb drive.  Logged out of the 2nd user profile, back into my main one, and copied it into the same folder.  Voila.  It’s a stupid work-around but it does work.

[Anonymous]

I have tried to re-install DisplayCal also and it’s the same issue – Developer you need to take a look at this.

[nik.bernadsky]

The bug persists under Windows too, only when the latest version has been used.

[Anonymous]

Ok, but how can I find the old release so I can revert back to it? I can’t have it like this!

[Gavin B]

I’m having this same issue, has anyone worked out a solution yet?

[Gavin B]

I found a workaround, delete the preference files .plist for DisplayCAL in Libraries/Preferences.

Was able to open up the application once this was done. Although I was prompted to re-download argyllCMS

• This reply was modified 4 years, 4 months ago by Gavin B.

[Florian Höch]

Delete DisplayCAL.lock in %APPDATA%\DisplayCAL and do not force quit the application.

[Author]

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