I have a new mac (my normal one is in for repair) and I have an external HD that I store my images on.
I've downloaded LR to the new mac and connected the HD with all my images.
However, how do I get LR to see the HD? I don't want to move any files to any other drives, because when my mac comes back from repair, I'll be returning this temporary one and will then hook this HD to my original mac and hopefully carry on from where I left off.
Have you opened the Lightroom catalog from the other computer?