I have the latest version of Lightroom 5 on my MacBook. Since yesterday, importing raw photos into LR on my external drive has been taking hours. Previously, I have successfully imported photos from my Canon T3i and D70. Now both import extremely slowly. Any suggestions?
Try a different import hardware, for example, if you are using a card reader, use a different card reader, or bypass the card reader and hook the camera directly to a USB port using the cable that came with the camera.