Sega CD Backup
ripping to bin-cue restoring from bin-cue
ripping to iso-mp3 restoring from iso-mp3 mac burning
Note: This was written by hotFusion (hotfusion@mac.com). He gets all the credit for this one, and I have left his text essentially unchanged. If you have any questions about this, you should ask him. I make no claim for whatever he says here.
Guide for restoring SegaCD
backup images on the Mac OS
This guide assumes you are using the most recent version of Toast 5 (which
statistically is the most widely used CD burning software on the Mac platform)
and have your backups stored in the .iso/.mp3 format. It also assumes you are
restoring backups on Mac OS X. I do not posess any backups in the .bin/.cue
format so I do not know how one might restore those but I think the procedure is
probably very similar.
1). You will need to decode your .mp3s into .aiffs or .wavs. The easiest way to batch process mp3s is using mAC3dec (http://sourceforge.net/projects/mac3dec). Simply open mAC3dec and drop all you mp3s onto the window and select AIFF as the format and 44.1 kHz as the Sample Rate. Click start and AIFF versions of your .mp3s should appear in the same directory as your .mp3s.

2). Find your .iso CD image and launch Toast. In the Toast main window, click and hold the Other button and select "Disk Image".

3). Drop your .iso image onto this window; its name should appear when you do.
4). With the image loaded, click the Audio button in the toolbar just above your .iso image's name.
5). Drop your .aiffs into the Audio CD window that comes up. Double check that they are in order (they should be) and select the "Pause" button in the top of that window and select "Set to 2 sec." (this should already be the case, but double check).
6). Now click the "Other" button WITHOUT holding down the mouse this time, it should take you automatically back to the "Disc Image" window. Hold down the Option key and click the "Record" button. You should receive a warning box about single session ISO disks, click ok (or yes, depending on what the button says, I forget).
If everything goes to plan you should have a working physical CD backup of your Sega CD games that can be played in the Model 1 or Model 2 drive. I can't actually vouch for the model 2 as I own a model 1, but the model 2 is a later version so I see no reason why it would not work. Congratulations!