Los requisitos para iTunes 9.0.3 (actual) son los siguientes
Macintosh Hardware
* Mac computer with an Intel, PowerPC G5 or G4 processor
* Intel, PowerPC G5 or 1.0GHz PowerPC G4 or faster processor is required to play Standard Definition video from the iTunes Store
* 2.0GHz Intel Core 2 Duo or faster processor is required to play HD video, an iTunes LP, or iTunes Extras from the iTunes Store
* 512MB of RAM; 1GB is required to play HD video, an iTunes LP, or iTunes Extras
* Screen resolution of 1024x768 or greater; 1280x800 or greater is required to play an iTunes LP or iTunes Extras
* Playing videos also requires at least 16MB of video RAM
* Broadband Internet connection to use the iTunes Store
* Apple combo drive or SuperDrive to create audio, MP3, or back-up CDs; some non-Apple CD-RW recorders may also work.
* Apple SuperDrive to back up your library to DVDs; some non-Apple DVD-RW drives may also work.
Macintosh Software
* Mac OS X version 10.4.11 or later; Mac OS X version 10.5 or later is required to play an iTunes LP or iTunes Extras
* QuickTime 7.6 or later
* Support for HE-AAC requires QuickTime 7.6.4 and Mac OS X version 10.5 or later
* Safari 4 or later
* 200MB of available disk space
Y según el support para el G3 (que está en la misma página, especifica para el G3, en la lista de la izquierda, abajo http://www.Apple.com/iTunes/download/ ),
es efectivamente el 8.2.1
http://support.Apple.com/kb/DL857?locale=es_ES&viewlocale=es_ES
cambiale las mayúsculas a los links por las correcciones autom.
:: MacBook Unibody 2.4Ghz > Magic Mouse & Wireless Keyboard > Time Capsule
:: iMac 21,5 :: iPhone 4s > iPad 2