ISO image files are typically used in the Windows operating system to store computer applications. ISO files can also be used on the Mac platform, however, and the operating system has no trouble working with this file type. You can extract ISO files on a Mac OS X computer by mounting an ISO image and then copying the files from the image to your computer's hard drive.
Click the "Go" menu from the OS X desktop. Scroll down and select the "Utilities" option.
Double-click the "Disk Utility" icon from the list to open it.
Click "File" and then select "Open Disk Image." Navigate the browser window to select the .ISO image you want to extract. The disc image icon will mount and appear on the desktop.
Double-click the ISO disc image on the desktop. Drag and drop the file from the window that appears to any other folder on your hard drive. Mac OS X will begin copying the files from the ISO.