I have Toast 10.0.9 Titanium installed under Mac OS 10.8.4 Mountain Lion on an Intel Core i5 iMac. I'm certain that I've burned video to a DVD+RW in the last several months without a problem but today I tried to burn a disc and got the error "DVD+RW - not writable".
I tried changing the burning speeds but it didn't affect anything. I can't figure out why this would suddenly be happening. DVD+RW is in the profiles list for Toast 10. Here's my burner's specs:
Model: OPTIARC DVD RW AD-5690H
Firmware: 4AH5 / MMC-3
As a test, I created a burn folder on the desktop and was then able to successfully burn it to a DVD+RW without any problem. I also inserted a CD-R and a DVD-R, both of which Toast 10 had no problem with. Any idea why Toast 10 would suddenly stop supporting DVD+RW?