1 person found this helpful
Please turn off the graphics processor from the Lightroom preferences.
Open Lightroom > Edit menu > Preferences > Performance > Uncheck GPU > Restart
Let us know if that helps.
Hi Mohit - thanks a lot, that has certainly made using tools like the clone stamp so much faster, it was jumping about all over the place before! And I am sure this has reduced the system load whilst performing editing tasks. I am still getting fan noise as a result of the iCloud syncing however - I think i need to disable this although it says it will delete all my local files if I do (even though I have turned off optimisation for Documents sync) - oh Apple what moron thought that was a good idea!
So two things sorted this:
1) Turn off graphics processor as above to minimise Lightroom hogging the CPU
2) As Apple won't let you turn off icloud syncing without deleting your files and making you download them to your Mac manually (?) I simply moved the three main Lightroom files (catalog, previews and smart previews) out of Lightroom folder within Documents into a folder in the root folder of the user and icloud won't try syncing them anymore.