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Macbook Pro (10.8.3) doing weird things!!!

Last week my Macbook Pro (10.8.3) started behaving very strange... applications would not open (sometimes they would after a restart), I was consistently getting "error code -50", mail was also doing strange things, sometimes after a reboot it would stay on Grey Screen with Apple and spinning wheel, I would then have to reboot in Safe Mode then reboot again... I have regular backups via Time Machine... any advice welcome

MacBook Pro, OS X Mountain Lion (10.8.3)

Posted on May 9, 2013 7:53 AM

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8 replies

May 9, 2013 8:58 PM in response to Steve_events

If you have more than one user account, these instructions must be carried out as an administrator.

Triple-click anywhere in the line below to select it:

syslog -k Sender kernel -k Message CSeq "I/O error" | tail | open -f -a TextEdit

Copy the selected text to the Clipboard (command-C).


Launch the Terminal application in any of the following ways:


☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.


Paste into the Terminal window (command-V).


The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.


A TextEdit window will open with the output of the command. Post the contents of that window, if any — the text, please, not a screenshot.

May 10, 2013 6:55 AM in response to Steve_events

The boot drive is failing, or you have some other hardware fault.

Make a "Genius" appointment at an Apple Store.

Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.

Keeping your confidential data secure during hardware repair

*An SSD doesn't need to be zeroed.

Macbook Pro (10.8.3) doing weird things!!!

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