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First it show a blinking folder after i start the computer with the Question mark. After i enter the recovery mode it asks me to select a wi fi netwotrk and after a few seconds trying to start the online recovery gives me the -21 00F error. can anyone help me with it
Hook up to your router or modem with a direct ethernet cable, then do the internet recovery.
Hi there, Error code -2100F usually indicates some sort of network connectivity issue. Internet Recovery can be incredibly picky in my experience, especially over wireless - small connection hiccups can cause it to just error out. One of many reasons I would recommend making a bootable macOS installer drive and using that instead: https://support.apple.com/en-us/HT201372 Please keep me updated on this, thank you!
