How to Burn Wii Backups on Mac OS X
This tutorial is for mac users. First download and install 'Burn' from here
Open the 'Application' folder in the Dock and Launch Burn.
Burn should now open, click on the 'Copy' tab. Then open up the folder in finder where your iso is stored and drag the file into the area in burn.
Burn should change into this screen. Now is the time to insert your blank DVD-R.
Press Burn and now it should ask you at what speed to burn. Lower Speeds are recommended.
Press Burn and allow it finish
It is highly recommended to use high quality DVD-Rs (not +R). For best results use Verbatims and Taiyo Yudens made in Japan, Singapore or Taiwan. Although DVD+Rs may work fine for some. To reduce errors and save your Wii's DVD Laser's life its best to use DVD-R from the brands listed above.
Burning Wii backup iso in OSX
Why not just use the built in 'Disk Utility' app - works for me.
if you have OSX, you have it already!
Open 'Disk Utility' (in Applications/Utilities)
click the 'Burn' icon or press command+B
navigate to your .iso file in the pop up dialog and select it
choose burn speed (I burn all mine on x2 speed)
I had the most success with Memorex DVD-R (Verbatim all failed for me)
I'm wondering whether this method works for GC Multi Isos - I don't see why it shouldn't.
* yeah, works fine for Gamecube isos too!