I don't want to be argumentative, but I have used MacGPSPro extensively for the last 8-10 years, including driving to Panama, all over Baja, all over the western US and both the Yukon and NWT in Canada.
Originally Posted by goodtimes
There is no problem transferring files [Waypoints, Tracklogs, Routes] from a Mac to a GPS [incuding Garmin and Magellan units specifically] and from a GPS to the Mac. I have run my Mac+MacGPSPro with input from a Bluetooth GPS for many years; it handles this seamlessly. [My current favorite is G-Sat's #BT-368, which never dropped a signal in 3 months of driving in the Yukon including heavy cover and heavy weather.]
MacGPSPro uses USGS 1:24k [7.5 minute] Topo maps which are geo-referenced into ".PICT" files. You can record real-time tracklogs directly into MacGPSPro or record them on a separate GPS and download and display them in MacGPSPro. Each GPS device company has its own file format so it can make money off the captive audience that has invested in its hardware. However, there are very good sources for free maps in Garmin format. [My favorite is: http://www.gpsfiledepot.com/]. However you cannot up- or down-load maps themselves to a GPS from MacGPSPro, anymore than you can upload and display Nat Geo maps on, for example, a Garmin. So this is NOT a limitation of MacGPSPro.
Disclaimer: I have no interest in MacGPSPro except for being a satisfied user for many years. I just don't want to see incorrect information stand about this or any other application or hardware.
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At its core, adventure is the willingness to commit to an uncertain outcome with an open heart and an open mind. [Matt Walker]