I recently bought some DVD+R discs to do a backup, as my burner (a newish LG multi) apparently supports this newer format.. So far, i have had no problems with DVD-R using toast, and IIRC this particular LG burner even worked natively, burning from the mac desktop (alas, no iTunes support, as usual!), however DVD+R discs don't work right..the mac desktop ID's them as 308 MB cdr blanks, and then spits them out. Toast burns to, *and* verifies these disks as succesful burns, but they don't mount on the desktop, I just get an 'unrecognized file system' error message, with the normal 'initialize, ignore, or eject' options. It's impossible to do a proper google search for DVD+R, bercause the "+" character is not accepted, althoug I've read comments that would seem to indicate that DVD+R is *not* supported and will not work on at least, older versions of the MacOS..as the drive supports it fully, i expect it's an OS support issue.. Anyone informed about this, and happen to know in which version of OSX (if any) did support appear? I'm still using 10.15 so if it's (DVD+R support) in any pre 10.4 version it might be motivation to get a newer version. But is it? Thanx..!

Yes, 10.4 does support DVD+R

I can recall using +R discs with 10.2.5.

OK.. I was aware that 10.4 likely supported it, as the new intel Macs' superdrives do.. Rather, I need to know when support first appeared- so that I know whether the problem is my drive or the OS I'm currently using (as I pointed out, it's 10.15) Thanx...