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Q: I have a question mark when I turn on my Mac. I tried pressing command + R at start up but after about 2-3 minutes of white screen ... more
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Jun 11, 2016 9:33 AMby a brody,Command-R only works on Macs whose recovery partition was installed when 10.7 or later was installed.
You can try to see if there is a bootable partition by holding down just the Option key at startup.
If there is not, then you probably have a damaged hard drive. Sometimes it is only the directory, sometimes it is the drive itself.
If you are lacking a backup, please read this tip:
