To be clear, it is hanging up and I have to force quit when it "crashes".
1>Optimize your Lightroom Catalog ..File>>Optimize catalog
2>Try disabling Lightroom use of Graphics card.
Uncheck "Use graphics Processor" under .Preferences>Performance
Also refer Optimize performance
See if it makes any difference
Let us know if that helps
Catalog is regularly optimized (most recent just two days ago) and I turned off the Graphic Card use. will that compromise performance though? I'm working with 36MP files and pushing them back and forth to PS!
Thanks for your Prompt Reply.
Larger catalogs consume more System Resources.What is your MAC Configuration?
Disabling the Lightroom Graphics usage helps if Lightroom is Freezing regularly specially while Developing..
Disable the Graphics card to see if it makes any difference (It will not make much Performance difference on Older GPU's)
Resetting Lightroom Preferences File will also help you increasing the Product Performance.
hold down the Shift and Option keys on Mac The Reset Preferences dialog appears.Select Reset Preferences.(*Backup your Catalog before this)
Let us know if it helps