In this example, I'll mount my external drive (at /dev/sda1) to a folder: Usually, mounting the volume should be a simple process of following the usual command line mount procedure (as root, or sudo-prefixed). If this is the case, great! You can get started straight away, no more configuration needed. Depending on your exact setup, it might be as easy as plugging in or inserting the media and having it automatically pop onto your desktop.
Whether it's an optical disc, external drive or other storage device, mounting a Mac-formatted volume usually is pretty simple. You should be able to install it by searching for that in your distribution's package manager. However, most distributions do include a package called hfsutils which might come in handy if you'll be regularly dealing with HFS/HFS+ formatted media. In most modern distributions, the capabilities for mounting media formatted with Apple's HFS and HFS+ filesystems is actually built in, and you don't need to install any special software. The answer is - yes, in most cases, and it is actually quite easy to get your Mac-formatted stuff mounted on your Linux system with read-only, and in most cases read-and-write, support. If you deal with Macs at all, you might be curious as to whether Linux is capable of dealing with disks and drives formatted for Mac OS X.