700MB CD-R in 10.4 = 670MB in 10.3?

Question

When I insert a 700MB recordable CD in my MacBook Pro (10.4.8) it tells me there's over 700MB of space on the disc. When I insert the same blank CD in my iBook G4 running 10.3.9, the space on the disc is suddenly under 670MB ("Available: 660.7MB" in fact).
I have a CD with 684MB on it that I want to duplicate. I can copy it to a 700MB disc in 10.4.8, but it won't fit on the same disc in 10.3.9. (Same result on two Macs running 10.3.9.) Why? Is there any way to get 700MB onto a 700MB disc in 10.3.9?

Answer 1

Hi HandyMac!
Try this procedure. But I'm not sure it works for RW discs.
From "Macworld" Feb 2005 issue p.90 Link To Article. Scroll to the second tip on the page.
Content:
Create a new folder in the Finder
Drag everything you want to burn, up to 700 MB, into the folder.
Open Terminal and type cd ~/Desktop
Press the Enter key. This changes Terminal's active directory to your user's Desktop folder.
Type hdiutil makehybrid -o myburn.iso (There's a space after the o in iso, and myburn can be any name you choose) DON'T press Enter
Switch to the "Finder"
Drag & drop the folder you created onto the Terminal window. Terminal should fill in the full path to the folder.
Press Enter. Enter key will then execute the command.
What you have done is used the hdiutil Unix command to create a hybrid disk image named myburn.iso (you can choose whatever name you like, in place of myburn, but use iso for the extension.
You should see the message "Creating hybrid image" in your Terminal window, as well as an indication of the task's progress.
When finished, you should see a disk image called myburn.iso on your Desktop.
You can use Disk Utility to burn this image, or you can type
hdiutil burn ~/Desktop/myburn.iso in Terminal
Insert a blank CD-R when prompted, and then just wait until it's done.
Good Luck!
ali b