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Sierra Problems

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Jul 19, 2010
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Motherboard
Gigabyte GA-Z77X-UD5H
CPU
i7 3770k
Graphics
Apple 5770 radeon
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
After a whole day of frustrations, I need help.

I finally managed to install Sierra, on a fresh drive.
Now, my screen is flickering. And I can't get rid of it.
On top of that, OSX only sees 4gb of ram, when I have 16,

I have been running El Capitan, for a while, and haven't installed for a while, so I am a bit rusty.

Hope someone can help.

See my hardware in my signature. Its all the same.
 
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