will magic mouse work on a late 2005 powermac G5

Hello,

It depends how much functionality you want/need..

Apple Magic Mouse requires:

• A Macintosh computer with built-in Bluetooth.
• Mac OS X v10.5.8 Leopard with Wireless Mouse Software Update 1.0 or Mac OS X v10.6.1 Snow Leopard with Wireless Mouse Software Update 1.0.
  Note: Momentum scrolling supported only on Mac OS X v10.6 Snow Leopard.
• Two AA batteries (included). See Apple Wireless Keyboard and Mouse: How to install batteriesto learn how to replace the batteries.

http://support.apple.com/kb/HT3061

Apparently only regular mose functions work in 10.4.x...

http://store.apple.com/us/question/answers/product/MB829LL/A?pqid=Q4J927UX7KADY7 4DAFTTP4XPYXH2YTDFC