Updated to Yosemite, now grey lock screen at start up. please help

PavelT

macrumors regular
Original poster
Nov 12, 2012
104
4
hello i am running a late 2012 iMac. i just updated to Yosemite os. and i restarted my iMac and now at start up i get a apple loading screen then it goes to grey screen with a no trespassing type of icon. and i can't do anything. i am very worried because i need to get to my desktop to retrieve some items that i have not backed up yet. any help, much appreciated. thanks.
 

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PavelT

macrumors regular
Original poster
Nov 12, 2012
104
4
it seems not able to boot into safe mode...same thing happens
 

PavelT

macrumors regular
Original poster
Nov 12, 2012
104
4
If it is a fresh install and everything is backed up, try booting into recovery and doing the install again. Maybe something got corrupted during the process. That is the best I can offer. Maybe someone else might have a better idea. Hopefully, your HD didn't die.
thanks for your input. but it unfortunately was not a fresh install. it was an update. and i didn't back up a lot of vital things that were on my desktop...i just want to recover those items...
 

mvleaf

macrumors newbie
Oct 18, 2014
4
0
Same issue with me. 2012 Mac mini..Yosemite worked fine for a day but when rebooted. Won't get past the log in screen. Tried rebooting into safe mode but no luck. Same with option key reboot
 

mvleaf

macrumors newbie
Oct 18, 2014
4
0
Ravenis - yes. I have the option between Macintosh HD or Recovery 10.10

Or do yoi mean the disk utility option on OS X Utilities screen when I use the Recovery option. My mouse moves around but has no effect when I click on any options. I can use tab and up down buttons but enter won't work. I'm stuck!
 
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mvleaf

macrumors newbie
Oct 18, 2014
4
0
It won't let me access menus or do any inputs. My pointer moves around the screen but can't execute anything. Same with my keyboard
 

vraev

macrumors newbie
Feb 26, 2011
8
0
Sigh of relief

Happened to me too. I unknowingly enabled TRIM after installing yosemite. Didn't start. Had a slight panic attack...lol... My HDD has all my school stuff which I can't afford to lose. Luckily...it was fixable with the support article at the trim enabler website.
 

PavelT

macrumors regular
Original poster
Nov 12, 2012
104
4
If either one of you guys are running SSD, give this a shot.

"If you try to boot a Trim-enabled system with the kext-signing setting re-activated, you will be met by a gray screen with a stop sign:" < same picture in OP>

http://www.cindori.org/trim-enabler-and-yosemite/
wow. this article totally makes sense!. as i am using a trim enabled ssd. once i upgraded to yosemite, first thing i did was enable trim enabler. then i shut down. then when i started back up, is when i got the stop sign....i managed to just re-install yosemite, through the disk utility at start up to get back to my desktop..
 

BasicGreatGuy

Contributor
Sep 21, 2012
11,688
10,726
In the middle of several books.
wow. this article totally makes sense!. as i am using a trim enabled ssd. once i upgraded to yosemite, first thing i did was enable trim enabler. then i shut down. then when i started back up, is when i got the stop sign....i managed to just re-install yosemite, through the disk utility at start up to get back to my desktop..
Glad to know all is ok now.
 

mvleaf

macrumors newbie
Oct 18, 2014
4
0
Sounds crazy, but my problem is with my trackpad. The pointer moves around, but it won't execute the "enter" function. Fits hit TJ email keyboard. I had to fire up an old Microsoft wireless USB mouse to login. Still have the problem. So now I have the trackpad and the mouse on my desk. Irritating, but i can do everything with this setup
 

DisplacedMic

macrumors 65816
May 1, 2009
1,411
1
wow. this article totally makes sense!. as i am using a trim enabled ssd. once i upgraded to yosemite, first thing i did was enable trim enabler. then i shut down. then when i started back up, is when i got the stop sign....i managed to just re-install yosemite, through the disk utility at start up to get back to my desktop..
yay! and what have we learned re always backing up before updating?;)