5/16/2023 0 Comments Seas0npass system restore failed![]() i had this issue as well. I was trying to restore the custom firmware, it would get maybe 5-10% and fail, error 21. If this still doesn't work and the custom restore starts but fails after ~5-10% with error 21 it might be your cable. following the process of fresh official restore, then custom back-to-back has solved my 21, 1600, 1601 errors. odd, but i promise I've done it both ways. another couple times I had to have it in DFU mode right before the custom restore. i've been able to do it NOT in DFU mode a couple times, just right after a fresh restore. ![]() You may need to put the atv2 into DFU mode right before you do the custom firmware (plug in wait 5 seconds till light starts flashing rapidly, then menu and play for 7-10secs.). I've done it a few times now, and if I don't follow this process I get error 21. itunes should recognize it again, then search and manually restore to the custom firmware. Unplug it from your machine, wait 5 seconds or so and plug it back in. I then performed a FRESH restore with the official apple ipsw. I then unplugged and replugged my atv2 back in, and let itunes recognize it. After I had the custom firmware created, I placed it on my desktop. For me it was a two-pronged issue.Įrror 21 points to bad cable, or bad ipsw.įirst, let Seas0npass create the custom firmware, but don't worry about it automatically restoring with it's scripts, they failed everytime for me. If you want to create a new restore point and are experiencing an issue creating one then this method will also be helpful to you.I was getting error 21, error 1600, and error 1601.
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