I cannot install myst v end of ages on my mac osx 10.5.4, is there a patch i can get to allow me to do so? I keep getting error message "getPartitionNames requires native support" Any help would be appreciated.

Welcome to the Forums!

As a first pass, take a look at:
-- Likely fix to Mac OS 10.5 problems
-- PC version WILL run on Mac
-- Myst V: Installing on Mac OS X Intel

Post back if nothing in those topics helps.