I coped this from someone on another site with the same issue. No one had an answer there.
"On all of my applications the screen 'blinks' every 10
seconds and whatever drop-down menu I'm in will close. This is very
annoying because on a long drop-down list it will pop closed before I'm done
selecting and I have to try and beat the clock to get to where I need to
click before it closes again.
In Apple mail it's really difficult to type an email without going back to correct missing text caused by the 'blink'
This only applies to applications. The desktop is fine!"
I have an early 2011 MacBook Pro, OSX 10.9.5
I already reloaded Mavericks hoping that would change but no luck. Help! This is making my mac almost ousel (I just tried to type useless, but the window flawed (flashed) agein. There again!
Eddie
"On all of my applications the screen 'blinks' every 10
seconds and whatever drop-down menu I'm in will close. This is very
annoying because on a long drop-down list it will pop closed before I'm done
selecting and I have to try and beat the clock to get to where I need to
click before it closes again.
In Apple mail it's really difficult to type an email without going back to correct missing text caused by the 'blink'
This only applies to applications. The desktop is fine!"
I have an early 2011 MacBook Pro, OSX 10.9.5
I already reloaded Mavericks hoping that would change but no luck. Help! This is making my mac almost ousel (I just tried to type useless, but the window flawed (flashed) agein. There again!
Eddie