Grey apple logo loads then black screen and nothing

[giuseppe04]

Hi Everyone
I just update my computer with Maverics 10.9.2 and after apple logo loads I have no screen
If I try again sometimes works ok sometimes I have to type GraphicsEnabler=No
I also have a lot of crashes running iMovie .
Anyone can help?
Thank you

 

[juise99]

With a GTX550 You actually need GraphicsEnabler=Yes. I was racking my brain with my dual 560's until I realized that series 5XX nvidia GPU's need =Yes, 6XX and higher need =No. I know from experience =No will work sometimes on a 5XX but =Yes will work every time.

 

[giuseppe04]

thank you <
but still a lot of problems after apple logo ,tried with graphicsEnabler=Yes ...

 

[carpentryplus25]

thank you <
but still a lot of problems after apple logo ,tried with graphicsEnabler=Yes ...

Try GraphicsEnabler=Yes IPGEnabler=No

 

[giuseppe04]

same thing...
why if I try to reboot at second or third time it's ok?

 

[giuseppe04]

Hi
Little bit better , but why it won't but on is own , every time I have to type
GraphicsEnabler=yes IPGEnabler=No