So my phone has been messing up on me lately, coming up with these notifications that "this Iphone does not support this software" or something like that and also froze up on me today, so I figured I should restore it just in case I had to send it in. I backed up my contacts and then hit the restore button. It said "restore and update" which I clicked and after a bit of downloading stuff (the updated software im guessing.) After all that an error box popped up and said: Im using a macbook. I used limerain to jailbreak. The software on the phone now is 4.1 Thanks for any help that you can through my way.