When I'm on a photoshoot, I upload my raw files to Lightroom on my Macbook, and make some development adjustments. When I get back home I copy the folder with my raw images to my desktop iMac using the 'export to catalog' command. This procedure normally works without a hitch. But in the last week or so, when I click 'export to catalog', the catalog info seems to copy fine, but the process hangs when it tries the copy the first of 371 raw images. I come back an hour later and LR is still trying to copy the first photo. There's no spinning ball either. The process just seems to stop.
MacBook Pro 13inch, late 2011 model, 2.4 Ghz i5, 4GB memory
El Capitan OSX 10.11.6
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