I used macOS Mojave on mid-2014 MacBook Pro before update. While installation it forced me to restart. After restart nightmare has been started. The Blinking question mark folder has appeared on my screen.

I tried,

  • Reset SMC and NVRAM (With all combinations these are find on internet and apple support page.)
  • Accsess local and network recovery (with all key combinations)
  • Access to time machine restore (with all key combinations)
  • Mojave installation USB stick (that USB works we tried another Macs)
  • External disk that includes pre installed mojave (that external OS works well we ran on other Macs)
  • Unplug all battery power (black reset)

Any suggestions?

  • 1
    Dealing with the same issue except mine is stop sign and blinks to folder, with verbose mode I get ‘no CSFDE users processed’ and that’s all.
    – ymg
    Oct 8 '19 at 17:26
  • 2
    support.apple.com/en-in/HT204323 See this support article for blinking question mark on folder. " it means your Mac can't find its system software." cc:@ymg
    – anki
    Oct 8 '19 at 17:29
  • @ymg does not start even with verbose mode
    – berkay
    Oct 8 '19 at 18:14
  • 1
    Same problem here. Today, after installing Catalina update, the pc restarted and start showing the folder blinking. Don't know what to do, i've tryed all keyboard combinations and nothing works, even with external keyboard!
    – Jakomys
    Oct 10 '19 at 23:43
  • 1
    @Jakomys Link to the question apple.stackexchange.com/questions/368304/…
    – abel
    Oct 13 '19 at 6:05

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