What I am thinking about

Step by Step - Updating iOS 4.x Beta to your device

This seems to be a general problem that people figure out by word of mouth and I couldn’t find and good instructions on how to do it.  Once the 3rd person asked me (after I had to ask a friend of mine), I decided to do a little post on it.

Notes:  

• To download the beta, you need to be a paid member of the Apple developer program ($99/yr)
• The file you download is a DMG file (disc image), so, that’s probably the most confusing part.

Go do the Developer apple site and grab the latest beta:

http://developer.apple.com

Now, once it’s downloaded (it’s a BIG file 500+MB), it’s a DMG file, so you need to double click it (just like you were installing it).  This will mount the disc image for you.  In Finder, you should see this:

The DMG file is mounted and you see the .ipsw file, which is what you need to select from iTunes to update your iOS.

Next, open iTunes and connect your device.

Hold down the “Alt” key and click “Check for Update” This will open a finder window for you to select a file.

Select your mounted image file and the .ipsw file is inside.

Select “Update” and just wait.  iTunes will take care of the rest.

If anyone has problems with this, let me know.