Hi Tom. Welcome and thanks for your post. This is a great question!
The choices of data logger for Mac is very limited because most of the GPS data logger comes with data logger download utility written for Windows OS only.
We recommend either Wintec WBT-201 or WBT-200 and use the free GPSBabel (beta stage as of writing) to download the logged data.
For geotagging, you ould use the downloaded Logged data in conjunction with either:
A) JetPhoto
or
B) GPSPhotoLinker (Mac OS X 10.3+)
FYI: This way to the product page for Wintec WBT-201 product page:
