When I burn a DVD why do I get a message saying the disc is unsupported?

Question

I recently burned a Memorex DVD+R on my Mac Mini.  But when I try to play it on my computer that burned it it won't play? Says unsupported disc.  My friend sent me DVD's she burned on the same brand DVD's and they play on my computer and TV DVD player?  This DVD I burned does play on my TV dvd player.  I've also had the opposite problems when dvd's  I burned playe on my computer but not on the tv dvd player.

Answer 1

Slower speed may help, but check System Preferences>CDs & DVDs to what happens when you insert a blank & set it to Disc Utility.
See what the drive supports...
At the Apple Icon at top left>About this Mac, then click on More Info, then click on Hardware>Disk Burning & report what it says, like ...
TSSTcorp CDDVDW SH-S222L:
  Firmware Revision:    SB02
  Interconnect:    ATAPI
  Burn Support:    Yes (Unsupported)
  Profile Path:    None
  Cache:    2048 KB
  Reads DVD:    Yes
  CD-Write:    -R, -RW
  DVD-Write:    -R, -RAM, -RW, +R, +RW, +R DL
  Burn Underrun Protection CD:    Yes
  Burn Underrun Protection DVD:    Yes
  Write Strategies:    CD-TAO, CD-SAO, CD-Raw, DVD-DAO
  Media:
  Media Type:    DVD-RW
  Blank:    Yes
  Erasable:    Yes
  Overwritable:    Yes
  Appendable:    Yes