Lightroom Classic CC & Mac OS Catalina - wrong GPU until system info performed

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SigZero Regular Member • Posts: 445
Lightroom Classic CC & Mac OS Catalina - wrong GPU until system info performed


I've been testing performance of my MBP 16" on Lighroom Classic CC with huge A7R IV files and I've noticed something very interesting. I have "full GPU acceleration" selected in performance tab of Lightroom settings and there it says that GPU used is "AMD Radeon 5500". But .. when looking into "This Mac" system info it is cleat that sill the Intel HD graphics is used. Exactly the same information I got from iStat - there is no process locking the AMD.

But after I click the "system info" button in Lightroom Performance setting page - the GPU is switched to AMD Radeon - which is both visible in "This Mac" and iStat (it starts saying that Lightroom process in forcing use of Radeon GPU). And immediately Lightroom gets a huge performance boost - as can be expected when moving from Intel HD Graphics to powerful Radeon 5500.

I wonder If someone else has some experience with Lightroom Classic CC (9.1) and Mac OS Catalina 10.15.2

Br, Pawel.

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