I burned a CD with pictures and PDFs on my Mac Pro but my Windows machine cannot read the CD. Should I have burned the disc differently to make it Windows-readable?
From http://support.apple.com/kb/PH10699?viewlocale=en_US (it applies to OS X 10.8 "Mountain Lion"):
You just have to follow the instructions in there. If you prefer, you can read more detailed instructions here: http://www.dummies.com/how-to/content/burn-cds-and-dvds-on-the-fly-in-mountain-lion.html
Both guides come down to this:
Make sure you choose a CD type that can be read on your Mac and your Windows machine. For instance, check that CD speed and capacity are supported by both optical drives.
If you wish to reuse a disc (CD-RW/DVD-RW/DVD+RW) you have to erase it first using Disk Utility. See http://support.apple.com/kb/PH5849 for more information.