Yosemite Boot screen Freeze

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hi
after installing yosimeti , during reboot progress bar freezes midway..

i'v restarted , did same thing.. me please....

thank you!
 

same issue after completing yosemite install last night. able os x after initial install. rebooted progress bar loads 1/3 of way , nothing else happens. able boot safe mode once doesn't work now.

did check disk , no issues found. read threads talking repairing permissions disk utility option greyed out.

note bootcamp , windows loads fine. happened yosemite install.

ideas before try reinstall of mavericks via internet recovery , have upgrade yosemite again?
 


Forums Macs macOS OS X Yosemite (10.10)


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