Do you think the quads will be able to run Leopard?

[iBug2]

Or just Snow Leopard?

 

[Hellhammer]

I can't see why they wouldn't run it

 

[r.j.s]

I think you'd lose a lot of power by running Leopard over SL, since the machine was designed to take advantage of SL features.

 

[300D]

A machine will only run the OS it was released with or newer.

 

[cantthinkofone]

A machine will only run the OS it was released with or newer.

Source?

 

[Icaras]

A machine will only run the OS it was released with or newer.

What the...?

 

[rdowns]

Source?

20+ years of using Macs.

You can't load older versions of the OS on anew Mac as it will not have the appropriate drivers you need.

 

[netkas]

Or just Snow Leopard?

Speaking technicaly, 10.5.6 restore dvd from 2009macpro has support for hd4850 and nehalem-generation cpus.

so, maybe that install disk, or 10.5.7/10.5.8 would work.

 

[richard.mac]

dont the quad core iMacs need an updated kernel to support the Core i5 & i7 and the P55 chipset?

 

[DDave]

It probably could run it but why?

 

[300D]

Source?

Every Mac since 1984.

 

[netkas]

dont the quad core iMacs need an updated kernel to support the Core i5 & i7 and the P55 chipset?

usb/ahci support for p55 is already in leopard(actualy the support is almost hw version independent)

 

[jsnuff1]

yea I can confirm that no mac will run an OS older than the one it was shipped with (other than the small point updates), and using another computer's OS install disk wont work either.

 

[frunkis54]

Source?

how about this
http://support.apple.com/kb/HT2186?viewlocale=en_US

 

[iBug2]

The reason I asked is this. My father is thinking of buying an iMac, but he's still using Macromedia Freehand, which apparently doesn't work well on SL, but works somehow ok on Leopard still. So if he can't install Leopard on new iMacs, he'll just have to buy the current 24" one.

Which is a shame really.