I've had good luck with Canon scanners. They make quite a good copy, and they have a "multi-scan" feature that will do what you want with your pictures. Mine is an LiDE 60, but they have probably upgraded by now. Just look for "multi-scan" in the documentation. Canon seems to keep up with Apple on upgrading their drivers, etc., so make sure you get the latest from their website. I have recently completed scanning over 90 years of photos -- about 25 gigs of old photos into my computer and it did a great job! One tip, though. If you are scanning black and white photos, leave your settings as though they were color photos. Some people have had problems with B&W (not specific to Canon scanners, just in general), and I did not have any such problems when I left the settings for color.
Good luck!