getasif
you might want to start a new thread
you are NOT installing onto a Apple "mini Mac "
a few things
Seeing as RHEL5 .5 is old ( RHEL 5.7 is the current in the 5 series )
is there a reason you MUST use a old version
if not , then why not use the current RHEL 6.1
Also red hat is NOT FREE !!!
you MUST buy a support contract license
-- you must buy RHEL - a 1 year support contract is $ 299 US
Have you read the red hat documentation ?
https://access.redhat.com/knowledge/docs/
have you searched the "knowledge base "
-- you will need the username and password you set up when you bought the required license --
https://access.redhat.com/knowledge/search