CD alert...disk not readable or show up empty on Mavericks
I have several CD's with pictures that worked on my old iMac. When I insert on this newer Mac with Mavericks, I keep getting the alert :This disk was not readable....ignore or eject only options. Those do not show up on Finder as an inserted CD. A couple of CD's that did show up stated they were blank. I know they are not. All of these CDs used to work with older iMac. I am no computer wizard and need basic, elementary instructions please.
There must be something very simple to resolve this. I tried turning off my external hard drive but that made no difference. I see nothing in prior threads that were helpful or understandable to me.
Thanks.
iMac (21.5-inch Mid 2011), OS X Mavericks (10.9), 2.GGHzIntel Corei5/ 4GB 1333MHz