Display glitch

[cecil.b]

Hi guys,

i upgrade my macbook white for yosemite but i encounter error with the display. it zoom the active window or even the window for typing the password.

i run in safe mode and it seems ok. but with safe mode some functions are not working and it repeat asking your password even though its correct.

 

[294307]

Resetting the NVRAM might resolve this issue. Details on how you can do this can be found here: http://support.apple.com/en-gb/HT204063

Summary:

To reset your computer's NVRAM, shut down your computer first. As soon as you press the power button, press and hold down Command + Alt + P + R.

Keep these keys held down until you hear the start up chime twice. Afterwards, let go of the keys to allow your Mac to start up normally.

Note: Resetting the NVRAM will result in your volume, screen resolution and startup disk selection settings to be reset to their default values.

 

[cecil.b]

thanks bbnck for the reply.

i did your instruction but it doesn't work. still have the zoom active window and once you click the icons there is the big square surrounding the icons.