I have a mac and when I downloaded the ISO disc and did MD5 checksum,several times its not matching to what mentioned on fedora website. I am new to Linux,anyone please help.
I have to keep on downloading ISO image and do checksum unless and untill the checksum matches for good installation?

Generally speaking, yes. The checksum is computed using integer summations on the bytes on the disk. I suppose it's possible hat the Mac integer arithmetic differers from that of the Intel chip, so the checksum might be computed differently. Can you try your disk(s) on an Intel system to see if the results are any different? (Honestly, I think that's a wild shot, but, if it's easy, why not try it?)

Oh, are you intending to install Fedora on your Mac? (Mine is an Intel system, so I've never looked into Mac distributions. In fact, I didn't even know that there was one available.)

Oh, if your download is bad, there are many different mirror sites you can try, and I believe that there is also some BitTorrent downloads available.

You may be getting an incomplete download. Check whether the iso size as listed on the website matches the one you downloaded.

From the Mac UNIX environment, try downloading the iso’s using the wget command. The wget command is a real bulldog when it comes to downloads. Once it gets its teeth into the download, it won’t let go.

For the RedHat server, it would look like this:

wget -v http://download.fedora.redhat.com/pu...i386-disc1.iso

A copy of the iso will be downloaded to the current directory. The downloads will probably be faster if you pick a mirror from the Fedora mirror list ( http://fedora.redhat.com/download/mirrors.html ).