Upgraded to Big Sur on 2015 macbook pro. Now Lightroom Classic will NOT open.

[Jen_Thurston]

Hello,

I've been away from my computer for a while (like a year) and finally back on it, so I upgraded all the upgrades. Big Sur is on it now. 2015 macbook pro. I have uninstalled and reinstalled Lightroom classic 20 times with restarts and removing preferences like all the recommendations suggest in this forum. I've transferred old backups and even my catalog and library to a portable hard drive. Lightroom classic will NOT open on my mac anymore. I'm paying for the adobe photographers bundle with creative cloud and the desktop version (classic). I only know how to use the classic version efficiently, so I'm at a huge loss for christmas presents this year. Please help? I miss my lightroom, and I'm regretting upgrading to Big Sur. All I see when I try to open it is a flash of the open screen then it disappears like I never tried. I have plenty of free storage. 120gb.

[GoldingD]

typically, see: https://helpx.adobe.com/lightroom-classic/kb/lightroom-error-catalog-cannot-be-opened-lrcat-lock.htm...

[Jen_Thurston]

It's not an error message. It crashes before trying to even open. I've deleted all preferences already.

[Ian Lyons]

If you haven't already done so, try disabling the GPU in the Preferences > Performance tab