daldds wrote:
Thanks, Searcher.
1st, this has happened only 2-3 times. & yes, I tried the thumbnail slider, of course. Also tried to find a reference to it in Kelby's Adobe LR book.
As far as I can remember, it has happened when I worked in LR on other things before putting in my card to download, rather than that being the 1st action I performed. I'm 80, so who knows about my memory.
I use a Mac Book Pro with Yosemite 10.10.3 & LR 5.7.1.
I haven't seen this problem before, so I have no tried and tested solution. If the situation recurs to the point of becoming intolerable I would suggest resetting your Lightroom preferences. I have no knowledge of Macs, but it appears to me to be a Lightroom rather than a Mac problem. I have also searched the Adobe forum but there appears to be no comparable bug showing up on other computers.
Click Purge Cache in both cases. then click on OK. If your cache is filled that might explain things, it should auto empty but it may be too small to work effectively. I keep mine at 10GB for the #Adobe cache and 3GB for the Video cache.