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Q: Bottom half of screen flickers black

Yesterday, while browsing on Safari, the bottom half of the screen on my Macbook (2009 - OSX 10.6.8)  went black and the upper half flickered. I was able to restart the computer only for this to happen again. I shut down the computer for the night and all seems normal today. However, in order to try to avoid this problem again, I'm posting on here to see if anyone can help.

 

Processor 2.26GHz Intel Core 2 Duo

Memory 2GB 1067 MHz DDR3

 

Model Name: MacBook

  Model Identifier: MacBook6,1

  Processor Name: Intel Core 2 Duo

  Processor Speed: 2.26 GHz

  Number Of Processors: 1

  Total Number Of Cores: 2

  L2 Cache: 3 MB

  Memory: 2 GB

  Bus Speed: 1.07 GHz

 

Not sure if this helps, but I have run EtreCheck and the first entry that springs up is:

The following internal tasks failed to complete:

/usr/sbin/system_profiler -xml SPLogsDataType


The next is:

System Launch Agents:

    [loaded]    com.apple.cvmsCompAgent_i386.plist - Invalid signature!

    [loaded]    com.apple.cvmsCompAgent_ppc.plist - Invalid signature!

    [loaded]    com.apple.cvmsCompAgent_x86_64.plist - Invalid signature!

    [loaded]    com.apple.servernotifyd.plist - Invalid signature!

 

Has anyone any bright ideas about what caused the black screen and what I can do to avoid this happening again?

 

Many thanks in advance.

 


MacBook, Mac OS X (10.6.8)

Posted on Nov 4, 2015 12:43 PM

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