DNG files black border on high contrast areas macbook

[gregj52397656]

Using the latest lightroom 8.5.1

Macbook Pro M4 16Gb 15.6.1

Opening a DNG file or using inbuilt de noise creates the same issue, a black border is added to high contrast areas. The DNG files do not contain this when viewed outside lightroom.

[Anshul_Saini]

Hi @gregj52397656,

Sorry for the late reply, and thank you for reporting this. The team has tested this internally on multiple setups (macOS 15.6.1 on an M3 MacBook Air with Lightroom 8.5.1/ macOS 26 on M1 Max MacBook Pro & M1 Mac Mini) but wasn’t able to reproduce the black border issue. To help us narrow this down, could you please try the following:

• Reset Lightroom Classic preferences and check if the behavior persists.

• Turn off “Use Graphics Processor” in Preferences > Performance and see if the issue still occurs.

• Copy and paste your System Info from Lightroom’s Help> System Info menu into a reply here.

This additional detail will help the product team investigate further.

Best,

Anshul Saini

[Noel Orridge]

Hi @gregj52397656! I'm just checking in to see if your issue is resolved. In case you're still facing problems, please try out the steps provided and let us know your system info as well. 

Thanks a bunch!