MacBook Pro stuck at Apple logo startup
Yesterday I started the MacBook and got to the loading bar with the Apple logo, loaded really slowly then it got stuck on the last bar and nothing happens, left my computer like this for 6 hours.
Restarted again, in safe mode, that didn’t work, loading bar still stuck. Restarted again with holding shift-control-opt key for 10 seconds to restart smc, then restarted with the p-y buttons followed by restarting again in safe mode. Still nothing. Stuck at the end of the loading bar.
Then I did the command-r to scan my hard drive in disk utility, it says it’s fine, restarted again, still nothing.
Did the command-r again, now reinstalled the high Sierra, first time it took me 11 hours to install, restart and still nothing. Reinstalled high sierra once more, this time it took only 2 hours, however still stuck in the loading bar, and safe mode still won’t start.
whats the problem? I have over 120 gb of free space, never had a problem with my computer before this. Should I open up my computer and clean the inside? Disk utility says nothing is wrong but it just won’t start. It’s 4 years old.
i don’t want to wipe the whole computer, I didn’t do a backup before this And I have important files that I can’t loose.
What do I Do?
MacBook Pro, iOS 11.2.6