How do I mount a Toast file on my mac using disk utilities? Disk Utilities says it doest recognize it?

What OS are you using, PC or Mac? If you're using a PC, you gonna have to convert that file into a ISO file and if you are using a Mac, download Toast 6.

Edit:

Well, pretty much most disk utility support multiple images (ISO, BIN, MDS, etc.), but Macs always have special files that you'll need a specific program. So, since you have a toast file just download Toast 6 and it should work out.

Open a Finder window. Select your difficult force, File > Get Info. Under "General", does it exhibit Available: 0? Your laptop could now not run with 0 to be had force area. Start the operation once more to erase unfastened area. Don't pick seven instances overwrite. That will take a few weeks and is immoderate besides until you're a secret agent or global palms trader. Two instances overwrite is tons. You would possibly get tons of unusual messages from the operation to erase unfastened area. Just forget about the unusual messages and click on Okay. Let it cross and do not even attempt to open, keep, edit, or transfer any documents till it's performed. Go away when you click on Okay and feature a cup-a-joe. It would possibly say it has five million hours final to conclude however forget about that still. Just permit it conclude. For the long run, use the Finder command to "comfy empty trash" whenever you desire to delete any touchy information. It takes a couple of seconds and I am inclined to wager lower than part your information demands this protection. To use the "Erase Free Space" operation in Disk Utility manner each and every little regardless of dossier have got to get the top protection medication and that takes plenty of time.