Garmin has released a Mac version of MapSource which can be pre-ordered – http://www.gpscity.com/cp?&s=00001&cr=022108GU&it=cnusa8ntm.
Garmin has also released an update to MapSource for the Windows platform at http://www8.garmin.com/support/download_details.jsp?id=209. They list the following as the latest updates:
Changes made from version 6.13.6 to 6.13.7:
- Fixed an issue sending maps to units on Asian language computers.
- Fixed an issue where the vertical profile was not displayed correctly.
- Fixed an issue when transferring data to a blank SD card.
- Fixed an issue where the map tile name was not displayed correctly on the unit after transferring to the device with MapSource.