You have a lot of options for this.
A simple thumb drive should be able to handle this. 1,500 photos sounds like a lot to you and me, but I'd be surprised if that takes up 4GB of actual hard drive space (unless they're all really high-res RAW pics). Even so, a 16GB thumb drive should be fairly easily acquired for around $15 or less.
You could burn a DVD.
The really elegant way is to use iCloud's Photo Stream feature to handle it wirelessly. Turn on Photo Stream on the receiving machine (requires an iCloud account which I assume you have already), set up Photo Stream on the "sending" machine if you haven't already, and it will wirelessly sync the pictures to the other machine. If they're very large files, this will take a while so don't let the receiving machine sleep while this is going on to save time (or, if you don't care about time, don't worry about it -- the pictures will still arrive, just more slowly as long as the machine is on).
If the pictures are still on your camera card, of course that could be used since your MBP has a card reader built-in.
If you're on Flickr Pro ($25/year), you can upload your pictures at full resolution to the site and then of course download them onto another machine (this will take a LOT of time).