Burned DVD will no longer play
DVD's that I burned on iphoto and recently worked have stopped playing on either mac or separate DVD player. The built-in DVD player shows message that "no support disc is available." The separate DVD player shows nothing. The content is still there as "disc utility" indicates . I am sometimes automatically directed to iphoto with the note, "Checking for up-dates". Sometimes an icon will appear on the desk top which I am able to open showing the content of the disc.
Larry suggested that the DVD is no longer good but it is strange that the discs were recently made and recently played and the content will appear on my computer in iphoto or finder.
iMac, Mac OS X (10.6.8)