The Mac OS X Finder and the Disk Utility (used to burn CDs/DVDs) together impose a limit on the amount of stuff that can be burned onto a CD to the specified size of the CD. And there is no way to get around this using these two.
On Windows, there exists disk burning software (a.k.a. Nero Burning ROM :) ) which supports something called as overburning, which will let you burn slightly more data than the specified capacity on a CD. Wikipedia has this to say about it. Obviously, the CD/DVD drive has to support it, but most modern drives do.
However, for Mac users, there is one simple way of overburning a disc using native (that came with the Mac) software. It’s a command-line utility called hdiutil.
Just requires three simple steps:
- If you don’t already have an ISO image to burn, create it by using this command in Terminal:
hdiutil makehybrid –o image.iso files_to_burn/
where files_to_burn is a folder which contains the file/s you wish to burn. - Load an empty CD/DVD in the CD/DVD writer of the Mac.
- Now that you have the image, in Terminal, go to the folder containing the image and use the command
hdiutil burn image.iso
It is very important to load the CD/DVD before you fire the burn command, because if you fire the burn command before you insert the disk, somehow hdiutil doesn’t overburn.
A word of caution, the amount of data beyond the specified capacity that you can overburn on a CD/DVD depends on the burning drive, the CD/DVD and the burning software (hdiutil here). So, be careful to remain within about 3-5% of the capacity of the disk over the capacity.
Footnote
More info about the utility hdiutil can be found in Apple’s man pages here.