Please see my comment to the question.
You can permanently mount the partition in any Linux-based system by editing the file "/etc/fstab". Let's assume that you want to mount some partition permanently and give read-write access to it to all users. Let's assume the partition is "/dev/sda2" (say, "/dev/sda1" is a Cent OS partition, for example), the filesystem is HFS+, and you want to mount it at the root level by the name "/MacOSX-partition". Then the line you add to this file could be:
# <file system> <mount point> <type> <options> <dump> <pass>
# ...
/dev/sda2 /MacOSX-partition hfsplus user,fmask=0111,dmask=0000 0 0
You will need to check up the partition and the file system type, which many utilities can do. Mac OS X modern file system is supposed to be HFS+. Please see:
http://en.wikipedia.org/wiki/HFS_Plus#Linux[
^].
See also this documentation:
https://help.ubuntu.com/community/Fstab[
^].
I referenced this Ubuntu documentation just because I use Ununtu more than other Linux distro, but this piece of functionality is pretty much universal; you can find it in many places. It is very unlikely that Cent OS won't cope with that, unless it is so badly obsolete to fail to support Mac OS X file systems.
—SA