This article is from the CD-Recordable FAQ, by Andy McFadden (firstname.lastname@example.org) with numerous contributions by others.
Any Mac of Quadra 700 or higher capability with a reasonably fast disk should
be suitable for 2x writing. All PowerMac-class machines, and probably
most Mac clones, should work fine at high speeds. PowerBook users should
proceed with caution on machines earlier than the 3400 and G3 models.
Any of the SCSI or (for appropriately equipped machines) USB and FireWire
recorders should work. Verify with the vendor of the software you plan
to use that the drive you have in mind is supported. You may be able to
use the internal IDE connector on some Macintoshes as well.
Using the "simulated cut" feature available on Toast and other software is
also prudent, at least until you get a feel for the system. Make sure you
turn off file sharing before you start a burn, or things will fail if it
tries to read a file that's already open. You may also have trouble
writing from the boot/system volume, since it will always have files open.
The good news for Mac owners is that the hardware and software
configuration for CD-R usually goes rather smoothly.