P: Not detecting older GPU's

On my Macs, the GPUs are perfectly detected, but not used at all. Zero. You can easily can track this yourself on "Activity Monitor" (or the Windows equivalent). That's a general issue with Adobe software on OSX and/or macOS. And independent if I try on a 2015 iMac5K or a recent beefy equipped MBP16, the result is the same: Adobe Software does not involve GPU on Mac in graphics processing - what is btw totally weird, the Mac is the graphics computer. Not the Windows PC. But somehow Adobe managed it to pervert this. Plase see attached screen shot. From over 2 hrs CPU runtime, developing raw files, exporting to jpg (88 images, that took 25 minutes), only 52 seconds the GPU was utilised. For what ever, but not that 25 minutes it took to export that 88 NEFs to JPG (46 megapixels from a Z7 to 2048 pixels long edge). Click on the image to enlarge:



Hint: in Activity Monitor you may press Cmd+4 for GPU and Cmd+3 for CPU history, the GPU usage below is caused by some other software, not LrC nor Ps: