May i know does the slow performance is only for the print module in Lightroom.
It's most noticeable with the Print Module, although the healing and clone tools are very slow too.
Exporting and rendering 1:1 previews are lightning fast
Go to the preferences of the Lightroom and under the performance tab.
uncheck the option which says "Use graphics processor"
I've tried that before, doesn't change a thing.
Quit from Lightroom and make sure it is quit by going to Force Quit then
Go to the location
[user name]Library/preferences or go to goto folder and type ~/library/preferences and click Go
rename the file called com.adobe.lightroom6.plist as com.adobe.lightroom6old.plist
Now , launch Lightroom and then try
Thanks Arnab_d99, That didn't do anything either.
It's been performing horribly since it was out of the box.
I plugged in the Mac, performed the software update, then downloaded the lasted version of Lightroom and its a fail.
I have three other iMacs in my studio all with Lightroom 5.x on them. No issues.