To my knowledge, it hasn't been updated in some time, but you should check out Ray Gun Studio.
Okay, I was wrong, it has been updated for OS X, and here's the URL: http://www.hitsquad.com/smm/programs/RayGunOSX/ Being shareware, you should be able to use it (at least for a while) without having to pay, or pay a small fee for it.
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System:
• 2.5 GHz MacBook Pro Core 2 Duo, 4 GB RAM, 200 GB hard drive, runs 10.5.4
• 1.6 GHz iMac G5, 1.5 GB RAM, 250 GB hard drive, runs 10.4.11
• iPhone, 4 GB, OS X 2.0.2 |