The Laser is only 250 mW and is unlikely to burn through its own shielding, let alone anything else. Worst case is it won't work and you will have to use the emergency eject (paperclip method)
2 of my friends tried this on his MacPro and the other guy on his iMac. The mini DVD got stucked on both machines. I would not advise in trying this out on your MacPro. Better if you have an external DVD writer you can try it on that one.
2 of my friends tried this on his MacPro and the other guy on his iMac. The mini DVD got stucked on both machines. I would not advise in trying this out on your MacPro. Better if you have an external DVD writer you can try it on that one.
Umm.. OK
Either they're morons are incompetent baboons... you choose.
For the record. The DVD writers Apple have installed in your MacPro are just rebranded OEM PC counterparts, there's nothing physically different with them internally or externally (with the exception of the label). Therefore, using mini DVD's via the tray won't cause them to be lost, or get stuck and before you think "i'll use a PC", the chances of them getting stuck on a MacPro is equal to that of a PC.
On the iMac however, it's a slot loader... common logic would suggest you don't put anything in there that doesn't appear like a full-size DVD. If you want or wish to use mini DVD's in a slot-loader, I'd advice you to use an adaptor, it's much safer! Better yet, avoid them completely.