Are you one of those lonesome people who tried to access the contents of a DMG image under Windows? Yes, there are several ways like converting to ISO with programs like Magic-Iso or mounting with Mac-Drive. All these solutions are nice, handy and well… expensive…

Simply using 7-zip is in my opinion the easiest way, as all of us should have 7-Zip installed anyway ;-)

• right click the .dmg file
• choose:
  7-Zip
• a submenu opens, in that submenu choose:
  unpack to <nameofmydmg\>
• wait a couple of secs while unpacking and
  open the subfolder <nameofmydmg\>
• you should find a bunch of files:
  0.MBR
1.Primary GPT Header
2.Primary GPT Table
3.free
4.hfs
5.free
6.Backup GPT Table
7.Backup GPT Header
• The file for further examination is “4.hfs”. It mostly is a lot bigger than all the rest of the files.
• now do a right click on "4.hfs" again and
• choose 7-Zip
• a submenu opens again, now in that submenu choose:
  unpack to <4\>
• et voilà…

you’re done with unpacking… now fire IDA and find the jump ;-)