".exe" is for wins
For quick start, go to Apple website, use default browser's bookmarks - a lot of useful leads. Also, find Mac user group forums for more info. Google some Mac, Apple keywords will give many leads. Here are some links:
http://www.macosx.com/
http://www.versiontracker.com/macosx/
http://www.macdevcenter.com/
http://www.macupdate.com/
http://developer.apple.com/
http://www.macaddict.com/
http://www.spymac.net
http://mac.softpedia.com/
