What is next step to update OS X 10.4.11?

Choose About this Mac from the Apple menu and check the processor.

If it's a G3, no further upgrades are available.

If it's a G4 or G5, buy a retail Mac OS X 10.5 DVD from a source such as Amazon or eBay.

If it's an Intel Mac, buy a Mac OS X 10.6 DVD from the online Apple Store.

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Hi Niel,

If I purchase this from the online apple store, will it erase all data from my 10.4 Tiger?

Bissellc wrote:

Hi Niel,

If I purchase this from the online apple store, will it erase all data from my 10.4 Tiger?

It won't erase. The Leopard installer is not available from the Apple store.

Mac OS X 10.5 Leopard installation system requirements

http://support.apple.com/kb/TA24950

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 😉