iMac 27" (late 2009) problem reinstalling Mac OS X Tiger OS
I would like to use my old iMac 27" (late 2009) for very basic email and internet but I'm having a problem reinstalling Mac OS X Tiger OS using an install disc - which may just be an upgrade or from another apple computer, having owned 7 or 8 over the years and not the original boxed disc...
I am more than happy to erase the 3Gb hard drive. I've tried downloading from the OS X Utilities page but after downloading I get another page stating
"OS X could not be installed on your computer - No packages were eligible for install. Contact the software manufacturer for assistance. Quit the installer to restart your computer and try again."
I have tried again and again but no joy...
Do I have to find the original version OS disc that came with the computer and start from the beginning or can I download the original OS from Apple to a USB stick and boot from that?
Also could you remind me how I boot up from a disc, hold down C or smoother combination of letter and buttons?
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