I have a PowerPC G4, 1.5 Ghz, with 1.5 GB of ram. Currently running OSX 10.4.11.  Can I upgrade to 10.5.8 (or higher)?  Need to load new software and said that was the minumum requirement.

I have a PowerPC G4, 1.5 Ghz, with 1.5 GB of ram.
Currently running OSX 10.4.11. 
Question: Can I upgrade to 10.5.8 (or higher)?  Need to load new software and said that was the minumum requirement was 10.5.8
Thanks, WPC-2012

Mac OS X 10.5 Leopard installation system requirements
http://support.apple.com/kb/TA24950
Leopard is no longer available at the Apple Store but may be available by calling Apple Phone Sales @ 1-800-MY-APPLE (1-800-692-7753).
If you can't obtain a retail install DVD from Apple, look on eBay or Google the installer part numbers to possibly find at an on-line store. Here's what to look for:
MB427Z/A  Leopard 10.5.1 install DVD
MB576Z/A  Leopard 10.5.4 install DVD
MB021Z/A  Leopard 10.5.6 install DVD (single user)
MB022Z/A  Leopard 10.5.6 install DVD (5-user family pack)
Installing Mac OS X 10.5 Leopard
http://support.apple.com/kb/HT1544
Mac OS X 10.5 Leopard Installation and Setup Guide
http://manuals.info.apple.com/en/leopard_install-setup.pdf
After you install the base 10.5, download & install the 10.5.8 combo update at http://support.apple.com/downloads/Mac_OS_X_10_5_8_Combo_Update
The DVD should look like this
Caution - Leopard does not support classic mode. So, if you currently open OS 9 apps in classic mode, you won't be able to do this if you upgrade to Leopard.
 Cheers, Tom

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