I've been using Mountain Lion for a while, and regularly I get a black screen, right after the login screen (after entering the password).
Often I have to reboot several times until it boots properly.
It is not clear when or why it happens: it could be some 3rd party code (gfxCardStatus, CUDA 5.0 sdk, steer mouse, Microsoft Intellimouse driver?) or something else.
Does anyone else have a similar issue?
I did not get black screen from update till today, so it probably solved the problem for me... Stay tuned 😉
To give you even more confirmation 🙂
After installing 10.8.2 and disabling the auto-login, never a black screen after login in again.
I left a message back on Sep 10 with same issues. Had done the fix suggested by Horatio Salzar and thigs were better for a while. I experienced the issue a couple more thime after that. Then the 10.8.2 update came out. I upgraded to 10.8.2, made sure that the Guest account is dsabled and no auto-login. Since the 10.8.2 I have not had a single problem with this. I have restarted > 40 times in the last week since the upgrade without a hitch.
I hope this takes care of the problem and that others have the good results that I have had.
Do you guys see any difference in shutdown time since the 10.8.2 update.
The update resolved the black screen issue but i have observed that every alternate shutdown takes longer than normal time.
1 shtudown - 3 secs
2 shutdown - 15-18 secs
3 shutdown - 3 secs
4 shutdown - 15-18 secs .. so on..
@YeshuS Yes - I'm experiencing the exact same thing.
DId you try pressing the brightness up/down a few times? This solved my previous ML boot to blake screen problem. ML seems to need some initial value in the PRAM in order to boot normally on my macbook
this worked for me 😉 thanks
Went to Apple store and genius was of absolutely no help what so ever!
Upgraded OS and problem is resolved. Although I the product should have worked out of the box and should not be sold with such a defect.
Since the upgrade I have noticed, like others, shutdown varies from quite quick to a little longer - however I would rather that than not booting properly at all!!!
Cheers
Steve
I believe this is the a solution on this problem.
** Disclaimer: You MUST be very VERY careful typing this command in Terminal, any mistake and you can risk renaming or deleting all files in your System/Extensions folder!!! **
First, make sure you have gfxCardStatus installed and set it to Discreet Only.
Then go to your terminal and type or copy/paste in the following command:
sudo mv /System/Library/Extensions/AppleGraphicsPowerManagement.kext/ /System/Library/Extensions/AppleGraphicsPowerManagement.disable
Enter your password.
Quit out of Terminal and restart your computer.
After restarting, allow your computer to enter into sleep mode (in Energy Saver, slide the bar to 1 minute to put it to sleep sooner). Wake it up, and run your computer normally. Go to Safari and see if your scrolling has improved or not. If it has, you can change gfxCardStatus back to Dynamic Switching.
Let me know if this worked for you.
Confirmed, shutdown time is much longer now.
@moeyk :Another confirmation too very long shutdown times.
Shut down, sleep, and wake from sleep takes much longer.
I am still having this issue despite all the latest updates installed.
I'm having the same issue with my Macbook Pro Retina mid 2012.
Sometimes it just hangs and reboot, when I do the SMC reset it hangs on a grey screen and the fan goes crazy.
Someone have seen something like that?
Brand new 2013 MBP Retina - boots, shows the login screen then BLACK.
Updating to 10.8.3 now. Let's see what happens.
black screen after login, Mountain Lion on Macbook Retina
