I have an emac with 74.5 Gb Hard Drive, and 765 Mb Ram, Power PC G4 Processor (currently running on 10.3.9 Panther) and i would really like to upgrade the operating system to Tiger Or Preferably Leopard (Or maybe even snow leopard) I would just like to know if the upgrade will format my Hd or just upgrade the operating system. This emac was previously owned by two famous singers in Mexico and has lots of pictures and videos of them and that's the reason why I would like to keep the files untouched. I was told by a non reliable source that tiger will upgrade and leopard will format but I do not fully trust this one person. Help will be appreciated
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Snow Leopard will not support PPC machines. Intel Machines only, so you wont be able to install it on your Emac.
Sometimes you can preserve your files intact when doing the upgrade, but not always. You will be prompted if you have to do a clean install.
Regardless, I would always backup my files externally before doing an OS upgrade.