my iMac won't burn printable DVD's consistently from iDVD. It burned several non printable DVD's and has burned some printable DVD-R's, but "rejects" most of them from the same lot, or says it's a blank disc if it seemed to burn.

Memorex are not highly regarded. Most of us here recommend Verbatim, Taiyo Tyden and Maxell. Fuji are also OK.

I would recommend Taiyo Yuden DVD+Rs. They are made in Japan, not China. (I get excellent results using iMovie 06 with iDVD 11.)

I have found DVD+R to be more reliable than DVD-R. The only disadvantage to DVD+R is that DVD players manufacture before 2003 may not play them.

DVD+R disks are better than DVD-R disks because of the increased error correction technique used for the newer +R type.

http://www.supermediastore.com/product/u/taiyo-yuden-8x-dvd-plus-r-media-white-i nkjet-hub-printable-100-pack?utm_medium=…

Burn at 2x or 4x - the slower the better!

Follow this workflow to help assure the best qualty video DVD:

Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image menu option. This will separate the encoding process from the burn process.

To check the encoding mount the disk image, launch DVD Player and play it. If it plays OK with DVD Player the encoding is good.

Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality. Always use top quality media: Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.

Yes, get the 8X if you have a choice between the two speeds as long as they are the high quality brands.

Having same problem with Memorex printable dvd's and NOT with non printable dvd's Never encountered before. Swear it's the printable dvd. When burning from idvd my iMac make a humming noise. I know at this point it's not going to work. Burning right now via toast. Still making noise. Is dvd drive bad or bad dvd's???

Thanks. Need done for Xmas party.