Because you burned them in the wrong format or you did not finalize the project. This must be done in iDVD and not in iPhoto.
Blu-Ray players will play ALL DVDs whether they're burned or not
most of the newer CD players can play burnt cds
No, the iMac will not play a Blueray disc.
A video burned to DVD can be played on MOST DVD players. But some older model DVD players can't read burned disks.Technology has come a long way since DVD players were introduced, so the majority of DVD players today can play burned media.
No. You can only play games made for Mac OS on an iMac.
Most DvD players and TVs sold in PAL countries can play both format of discs
Yes! The higher quality CD players have better capabilities on playing burned CDs.
Yes they do. Certain brands, such as Magnavox, can also play photo CDs.
There is no Mac version of Maple Story but if you have a recent iMac with an Intel processor than you can run Windows on your iMac and play the Windows version of Maple Story - see related link below for details.
Im thinking of buying a imac g5 but I don't know if I can run Minecraft on it
Yes
No it will not play a 6" disc. It will play a CD or DVD.