Photoshop 2020 bug

[melissas64790222]

When I add effects to a group in Photoshop 2020, I'm getting a square of the same color that the effect is using in the top left corner of my psd. It will only go away if I turn off the effects. I have tried restarting Photoshop and just downloaded the newest version to try to fix this bug.

[Kevin Stohlmeyer]

What OS are you on? Have you checked your video drivers for updates?

[melissas64790222]

macOS Majave Version 10.14.3
I have a MacBook Pro 2017
Radeon Pro 560
Intel HD Graphics 630

[JJMack]

Make sure Photoshop only sees one of you Machines GPU.

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[Chuck Uebele · Accepted solution]

Try checking "Use Legacy Compositing" in the preferences under performance. 

[melissas64790222]

That worked to fix the problem. Thanks so much!