0

My Mac will not start up. I went to recovery mode and made a backup of everything on an external drive. Now the Mac only starts up from the external drive.

I have OS X 10.10, Yosemite. I tried to backup and restore but it failed.

Most of the time my internal hard disk is not mounted. I ran Disk Utility today and got the following message for my HD Error: Partition Map check failed because no slices were found

How can I fix my Mac and make it start without the external drive?

Improve this question
8
  • 1
    so the holding "cmd+r" during boot is not working ?
    – Ruskes
    Commented Jun 26, 2015 at 7:27
  • it does work. Thats how I transferred all my data to my external hard disk.
    – Rish
    Commented Jun 26, 2015 at 7:35
  • 1
    Did you try formatting the internal disk?
    – tubedogg
    Commented Jun 26, 2015 at 7:36
  • Is that by erasing it? I tried that but it hangs halfway.
    – Rish
    Commented Jun 26, 2015 at 7:37
  • and when I go into recovery mode, it does not connect to my wifi. However it connects to it when I boot up from my external drive.
    – Rish
    Commented Jun 26, 2015 at 7:37

1 Answer 1

Reset to default
1

Looks like a disk problem, dying. In the Recovery Partition (start while holding CMD+R), start DiskUtility do Repair Disk. Even when the issue is gone after that, prepare to have the disk replaced.

Improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .