P: Hang while using Shawdows/Highlights tool with the Histogram panel showing (macOS)

Finally being sorted out, this is very poor. We all pay for a CC subscription. I glad this has been finally addressed.

I trust that Adobe are sorry that the "assistance" give by their on-line chat agent to me 3 weeks ago was totally wrong and his on-line access to my system ( which he said was needed in order to sort the problem out) resulted in the totally unnecessary disabling of my anti virus program. Not only that but when he uninstalled said anti virus program he did not do it properly and the upshot of that was I had to have a long series of calls to the BitDefender helpline to sort matters out.

The agent also unnecessarily stopped Photoshop using my Graphics Card which also had consequences which I have now rectified having implemented your work-round ( which does appear to have solved the original problem).

I believe an apology is in order, a) for the "bug" and, b) for the actions of the on-line chat agent who caused more problems with his "fix" which did not result in a stable resolution of the fault and left me in a worse situation than I had been in. He should have referred the matter up first before denying there was a "bug" and then fiddling with my system.

This will be fixed in the next update which will be out very shortly. Workaround is to hide the Histogram panel when using Shadow/Highlights.

This made no difference in my situation and was a PITA to reset everything back again!

Same problem for me too.

Macbook Pro
MacOS catalina

The way I solved this was to delete PS and reinstall without preserving preferences. A royal PITA but it worked. Adobe must know about this. I don’t want to have to do this after every minor version update.

Same here: 

same probleme with H/S on Mojave and PS 2020

Hopefully, Adobe will address this. You can roll back to version 21 (AdobePhotoshop21-mul.dmg) - I got this from Adobe, as they do not have the installer available online to download.

https://we.tl/t-QKlgzag7J8
 

Here the same problem!
Hope Adobe solve this very soon!!