I also have installed a Mashita DVD UJ-8455 and have the ability to read CDs. When I insert a blank CD or DVD, the finder tells me I get an error message that the disc drive is not supported. Any idea?
I have the same Matshita model # (not sure about the OEM). I recently installed Toast 7 and when I go to burn a Dual Layer disk, I get media errors. I too can't find a firmware update anywhere (actually, I did, but someone said it's a Toshiba OEM... I don't understand how a model with a different brand is different. How do we find out what brand it is?) I run this drive on a Lombard Powerbook with a G4 processor from Daystar (XLR8.com). I got the drive from FastMac.com. I have 512mb ram and the computer runs Panther 10.3.9 at 450mhz. Had no problems burning cds in Toast 5.3 Titanium. Patchburn 3 had no profiles for this drive.
My "MATSHITA DVD-RAM UJ-845S" is beeing recognized and when I insert a CD/DVD the finder ask what to do as usual. But the nothing shows up. If I choose open iTunes and then try to burn, I get the error:
The attempt to burn a disc failed. The device failed to calibrate the laser power level for this media.
I have the same problem with an iBook G4 running OS 10.3.8. The drive will read CDs and DVDs just fine, but I can't burn to CD-R using the native OS X burn feature, iTunes 6.0.4, nor Roxio Toast Titanium 6. I also tried Patchburn, and that didn't help at all. It merely came up with different error messages (i.e. in iTunes: "writing speed is to fast for drive" and it was set to 4x). I have sent an email to Panasonic (firstname.lastname@example.org). I suggest you do the same. Maybe if enough people complain about this drive, they will come out with a patch faster.
I got my drive from FastMac.com and just sent it back. They're sending me a replacement which is a UJ 845B. I read up on it and apparently its laser is more forgiving with a variety of different media.