Blank DVDs become 'locked' as soon as I try to burn on my Mac

Yet another wierd eccentricity of the Mac-world.... I put a blank DVD into my Mac; in the 'get info' window it all looks normal, and UNlocked - yet as soon as I drag the files across to burn them, it suddenly tells me I cannot burn onto this DVD because it is 'locked'. I look again in 'Get info' - and the DVD is locked - and the box is greyed out so I cannot untick it...This has happened 4 times now & I'm getting sick of it - does anyone know what is going on here & why all the blank DVDs become mysteriously 'locked' when I try to burn files to them? Thanks...

Hi, in the Get Info window, can you unlock it with admin PW?
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Safe Boot , (holding Shift key down at bootup), use Disk Utility from there to Repair Permissions, test if things work OK in Safe Mode.
Then move these files to the Desktop for now...
/Users/YourUserName/Library/Preferences/com.apple.finder.plist
/Users/YourUserName/Library/Preferences/com.apple.systempreferences.plist
/Users/YourUserName/Library/Preferences/com.apple.desktop.plist
/Users/YourUserName/Library/Preferences/com.apple.recentitems.plist
Reboot & test.
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.
To find out if it's system wide or user specific, try this...
Open System Preferences>Users & Groups, unlock the lock, click on the little plus icon, make a new admin account, log out & into the new account.
Does it work in the new account?

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My new iMac (and first ever Mac) arrived last
Wednesday. Over the weekend, I tried to burn some
quicktime movies to dvd.
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(10.4.5)
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Topic: "Please insert a blank DVD-R disk". DVD burning prob

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arn

Hey Jordan,
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we tried reading the blank disk with finder. Wouldn't even show up on desktop. Then we popped in a movie dvd - read just fine. We went in to system preferences (cds/dvds) - everything a ok. Finally, popped in the mac os disk and did a new archive install - same result =( The tech told me to take it into an apple store which I will be doing soon. Their explanation was that since it was reading the data dvds fine, the problem was the head that detects blank dvds was malfunctioning ( i guess it has 2 heads - 1 to read the data and 1 to detect blank disks). Either way it's covered under warranty ( 1 week old) so hopefully they'll take care of it. I'll post more news once I get it back - crossing my fingers X .....
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arn =)

Blank DVDs become 'locked' as soon as I try to burn on my Mac

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