mac and the 360 (can you use csv files?)

Yes, you can. You'll need a program to read them. All csv stands for is "comma separated values", so even a text editor will work.

Here are some other apps. that will open, read, and save as csv:

1) Microsoft Excel for Mac
2) FileMaker Pro
3) TextEdit (look in your Applications folder)
4) BBEdit (maybe)
5) Numbers (maybe)

I can't vouch for options 3-5, but I know for a fact that Excel and FileMaker Pro will do the trick.

Jeff

I can vouch for TextEdit. I use it a lot when ever I need to do very minor/quick tweaks to a POI file.

PT

Do you just want to load a csv file onto the unit? If so, you should download the beta version of Mac POI Loader:
http://www.versiontracker.com/dyn/moreinfo/macosx/32218

Change the poi file from poi.cvs to poi.txt then most computers will recognize and open the file, but don't forget to rename it when you are through...