So lately I decided I was tired of Tiger, and decided I would upgrade to Leopard. Well I made the mistake of erasing the hard drive before I made sure it would work. Well now like the installer was before it failed. And now when I boot it just won't work

So, does it still boot from the Install Disc?

If you don't know the model, find the Serial# & use it on one of these sites, but don't post the Serial# here...

http://www.chipmunk.nl/klantenservice/applemodel.html

http://www.appleserialnumberinfo.com/Desktop/index.php

How to find the serial number of your Apple hardware product...

http://support.apple.com/kb/HT1349

Then, what are the 2z691-****-A numbers on the Discs?

Did your Leopard install disc liook like this?A gray install disc can't be used.

 Cheers, Tom 😉

Find out the 2z number from your buddy.

Rather than relying on a pirated version, you will have to buy a black retail install disk from Amazon or eBay if you want Leopard.

Shouldn't cost more than max $200.

One option not mentioned yet is MacDrive for your PCs... allows them to Read/Write & Format HFS+...

http://www.mediafour.com/products/macdrive/

I think you'll need to find a Retail 10.5 Disc.

Leopard requirements/10.5.x...

* Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor

minimum system requirements

* 512MB of memory (I say 1.5GB for PPC at least, 2-3GB minimum for IntelMacs)

* DVD drive for installation

* 9GB of available disk space (I say 30GB at least)

Classic/OS9 Apps no longer supported.

Trouble is Apple no longer sells it, check eBay & such for the Retail version, not the Gray Discs...

http://www.ebay.com/sch/i.html?_nkw=mac+os+x+leopard+retail+10.5

There are workarounds if the 867MHz CPU is the only hangup...

http://sourceforge.net/projects/leopardassist/

http://lowendmac.com/osx/leopard/unsupported.html

List of Applications Not Compatible with Leopard...

http://guides.macrumors.com/List:Applications_Not_Compatible_with_Leopard

Does just alt, or in some cases, just Windows key work?

Is this a Wifi or USB KB?

I suspect you might have to find a true USB KB to get past this.