Everytime I open LR now its so laggy. All my star ratings are gone from the filmstrip down the bottom and everything takes several seconds to activate. If I go to quick it freezes and I have to force quit. I have tried optimizing my catalogue.
I thought I had completed it but does this info help?Welcome to the forum.
The usual culprits are a lack of system resources. RAM, CPU Cores, free space on the primary drive for working storage or other apps running coincident with LR that are conflicting with LR. These could be other heavy consumers of RAM, Cores and Working storage. Also running a virus scanning app in the background against the files that LR needs to work can interfere with LR's performance.
If you fully complete your Lightroomforums user profile, I will have the information that I need about your computers hardware configuration wrt RAM & cores. You can also supply information about the freespace on your primary drive that LR needs for working storage.
Updating to 2015.5 is essential but freespace on your primary disk drive for working storage is important too. Could we have that number too? I think getting unto 2015.5 will solve much of your issue. Also updating OS X to 10.11.4 will make sure that LR and OS X are tuned for each other.I thought I had completed it but does this info help?
Version 2015.1 and 2015.2 are particularly buggy releases. Updating to LRCC 2015.5 will likely solve the original issue. And being limited to 8GB of RAM does not help with performance.H'm. While I agree that 49GB isn't all that much, I would be very surprised if that amount of free space was already too little for Lightroom to perform adequately. My guess is that this could be a permissions problem. ...