For what it's worth, there are issue trackers offered alongside even the free levels of both github and bitbucket.org (which lets you use both git and hg). Bitbucket's free tier even lets you have a private repo if your source needs to be private (issue tracking and wiki instantiation are configurable via admin there, and should be offered as part of project repo creation). This way you get source control for your personal work as well as an issue tracker. ;)
I vaguely recall that Sourceforge also has some sort of bug tracker as well, if you'd rather use cvs/svn. (It's been a long time since I looked in that level of detail at SF though, so ymmv.)
All of these are "cloud" (blech) solutions that don't require any server setup on your part. If you aren't familiar with source control, that's kind of another matter, but there are quality GUI clients for OSX for most of the common protocols and cvs, svn, git, and hg all have reasonably good documentation publicly available in various forms.