Canon Solutions Disk v25.0 Mac OS X | 436MB
Could not find this anywhere and a lot of people just throw this disk away, so here you go... Canon Solutions Disk v25.0 (Disc That Comes Bundled With 5D Mark III). All content from original CD included (Much needed EOS Utility 2.11)
I had a issue trying to mount this with toast but worked my way around it.
1. Open "Toast"
2. Select Copy
3. Open Source File "CanonEOS250WM.iso"
4. Insert CD-R & Burn
Worked like a charm for me running 10.7 on Late 2011 MacBook Pro