LÖVE

XTUX345 wrote: Thanks to both of your advise, I've decided to go with Sublime Text 2 with the Love package. It seems to be working out quite well, and I'm glad that you recommended it.

The only thing bad in Sublime is that ending the alpha dev phase it probably end be paid a price similar than TextMate one. So remember keeping last dmg's and before update check if the changes don't turn it kind of crippleware.

XTUX345 wrote: gedit is simple but very good (and presintalled usually) on Linux. It recognizes Lua without any modification too. Maybe there's a Mac port?

Well T-Bone, there is a lot of any other OS's/open-sourceeditors like Gedit that have a port for OSX. But I really didn't want advise any non native cocoa app. Gedit uses GTK like Gimp, Inkscape wich leads sometimes to occasional random sloppy performance, bad drawn window resizes and other small things.
But you can also test that XTUX345 here it's the DMG
http://ftp.gnome.org/pub/GNOME/binaries ... 2.30.2.dmg

a good one