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Mike
Mike, Mac Medic
Category: Mac
Satisfied Customers: 8415
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
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Incorrect block count, I don't know am sorry, There was an

Customer Question

Incorrect block count
JA: What OS X (Operating System, e.g. Sierra, El Capitan, Yosemite, etc.) or iOS are you runninng?
Customer: I don't know am sorry
JA: Have you installed any updates recently?
Customer: There was an update last week but postponed to dobit
JA: What troubleshooting have you tried?
Customer: I tried command plus s and start button Cos when I start it tries to load but then goes off
JA: Anything else you want the Mac expert to know before I connect you?
Customer: No
Submitted: 4 months ago.
Category: Mac
Expert:  Bruce Wilner replied 4 months ago.

Hi. I would be delighted to assist you.

"Incorrect block count" sounds like a portion of a message. Can I have the complete message please?

This sounds like a problem encountered during a file system check during boot. Have you tried opening a command prompt as the super-user (the "root" user) and typing the command fsck -s to check the file system and reconstruct the (presumably damaged) superblock?