Well, I did input several spots from Ernst's newest book yesterday. My thumb felt like it was going to fall off from inputting about 5 spots. I would input the coordinates plus I would name the spot too.
If there is a Garmin MapSource product that will run on a mac it is very simple to make each T.E. waterfall a waypoint and download them into the 60 CSx.
If no map program the just turn on the GPSr press "mark" and then edit the coords to the T.E. coords. You might be sure that the Ernst coords are written Degrees Minutes Decimal Minutes as are the coords from GC.com for geocaches.
Welcome and Good luck.......poppy