Choosing Which Mac OS Can Read Your Disc
When you are making a data disc, you can determine whether the data disc is usable on ALL Macintosh computers or only Macintosh computers running Mac OS 8.1 or later.
To choose which Macintosh operating systems can use your data disc:
1Click the Disc Settings button (or the disc title).
The Disc Settings drawer opens.
2 In the Disc Settings drawer, click Advanced, then choose which Macintosh operating systems can read this disc:
If you want the final disc to be usable only on a Macintosh with Mac OS 8.1 or later installed, leave HFS Standard unchecked.
If you want the final data disc to be usable on ANY Macintosh, select the HFS Standard check box.
You are now ready to continue adding files to your data disc.

See Also:

Compressing a Mac OS Only Data Disc
Encrypting a Mac Only Data Disc
Scheduling Automatic Backups
Copying a Data Disc