> they broke it for the Pro Display XDR
What do you mean, they had to kill DSC for Pro Display XDR to work?
What do you mean, they had to kill DSC for Pro Display XDR to work?
Everyone using monitors with DSC 1.4 to the extent of their monitors capabilities saw those capabilities crippled and remain crippled ever since.
Those devices continued to work fine under Catalina.
Downgrading DSC from 1.4 to 1.2 on those monitors gave "better" performance (i.e. higher than without DSC, and higher than they were with DSC 1.4 with Big Sur+).
Hundreds or more bug reports were filed. This affected users of different Macs, different GPUs, different monitors.
The only common thread was DSC 1.4 and Big Sur (Ventura, Monterey... this still hasn't been 'fixed').
Given that the Pro Display and Big Sur came out 'together', it's very hard not to draw the conclusion that Apple found "sufficient bandwidth to drive the Pro Display XDR" by making changes to their "DSC 1.4" implementation that only the Pro Display understands.
MacOS Ventura seem to properly sense that monitor supports DSC: "DSC Support: 1, DSC Algorithm revision: 33" , but then simply disables it anyway: "DSC Enable: 0x0".
Torn between not wanting to support such behavior, and being one of the minority that could actually justify the Pro Display (photographer who works in at times challenging light environments).