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    How to startup a MacBook pro with bad OS

    I started to install the new OS Sierra when I saw a note pop up that said that my Version of Quicken would not work.  I shutdown the computer to stop the Sierra installation.  Now i cannot startup the computer using Command R.  I get a message that says my computer has a problem and to press any key.  Then i get some jibberish in the upper left corner of the screen for a few seconds.  Then the cycle starts over.  I have an external HD with OS 10.11.6 on it but cannot get to it to restart the computer.  HELP

    0  Views: 402 Answers: 1 Posted: 7 years ago

    1 Answer

    Try here...http://www.macworld.co.uk/how-to/mac/10-steps-take-when-your-mac-wont-start-up-or-turn-on-3423817/



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