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Bootup problem!!

Hello I have a macbook pro retina late 2012 with 512 ssd .I have a partition  with windows and macintosh ,windows are working fine.

Mac was working well without problems since the day i purchased it until  2 days ago. I had a lot of keychain notifications for a while after each restart, iwas asked to put my password in some fields i guess it had to do with the credentials. Finally i reset to defaults  the keychain , i did a reboot and i was stucked in a blackscreen with  apple logo and the progress bar reaching until half every time.

I have already made nvram reset, i have made a disk repair through recovery  without errors,i have removed the battery and  also i have reinstall the OS but nothing solved my problem.

Safe mode is not working and iam trying to avoid factory reset because i have  150 gb of data that i need and i havent got anyone with another mac to connect it with firewire in target mode to take the data.

And extracking them from windows would be difficult  because of the different format that only allows 4gb for transfering.

Any advices?

Thank you in advance.

Any advices?

Do you have a recent Time Machine or disk clone backup of your Mac partition? If so, you may be able to recover your data after you restore your Mac with a fresh copy of macOS.

最後更新：2017-09-05 01:54:23

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