Blue screen flash on Mountain Lion startup

I'm using a mid-2011 MacBook air and I recently installed Mountain Lion. For the most part, Mountain Lion always booted up normally. The Apple logo would slide up and reveal my accounts. But since yesterday, this startup animation is missing, it's now been replaced by a blue screen, which then reveals my accounts. It's very strange.
Any idea on what this could be?

I have the same problem.
Opening any design program photoshop, flash or firework, macbook pro screen turns blue.
I have use Mac OS 10.8.1 mountain lion

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Mac mini dual display - blue screen flashes frequently

I recently purchased a mac mini i7 model, with fusion drive.
I have upgraded the RAM to 16GB.
I have also purchased 2 monitors, both are LG 22EA63V LED.
I connected one monitor direct HDMI to HDMI.
The other monitor is connected from Thunderbolt to HDMI.
Everything worked amazingly well for the first few weeks. Now, not so much....
I frequently have the screen freeze and flash blue, and then resume as normal dual display mode.
Other times the screen will flash blue and then come back as a single display. In this case the Thunderbolt to HDMI display appears as primary display, while the HDMI display loses connection.
If I unplug the HDMI display completely, the blue screen flashing does not happen at all.
So, what could be causing this problem, and how do i fix it?

Hi Matt,
See if there's some setting on the HDMI monitor for Input Source, or things like Auto-tune.

Full screen mode in Mountain Lion

Hello everybody!
I am experiencing certain problems with full screen mode in mountain lion 10.8.2 freshly installed (not upgraded over Lion or ML 10.8.x) on Macbook Pro 13 mid 2010 model. Whenever i open an application which supports full screen mode, it opens on my desktop so I have to enter into full screen mode. When I quit the application and reopen it, it again opens on my desktop then I have to again enter into full screen mode. What I want is that all apps open in full screen mode if they support like, calendar, mail, safari, notes, reeder, itunes, app store and so on.
What could be the problem that is preventing my apps to start automatically in full screen mode?
I would appreciate any kind of help from anyone of you.
Thanks.

Go to System Preferences > General and untick Close windows when quitting an application

Where is the association between applications and Spaces screen configured in Mountain Lion?

Where is the assocation between Applications and Spaces screen configured in Mountain Lion?
In 10.6, I had FileMaker come up in Space 2, and it still does in 10.8 but I don't know how to change it.
Anyone know?

Right-click the icon in Dock and select Options

How does one silence mountain lion startup sound?

How does one silence mountain lion startup sound?

After asking this question many times and always getting the ususal fixes (that don't work in Mountain Lion) Psst, Startninja, turn down the sound when you shut down, yada yada yada. And the "why don't you just put it to sleep" comments :/ duh.. Sometime we want to shut it down!! Even Apple support has no idea how to do it. Here's is the fix and it is so simple it hurts.
Controlling the volume of the startup chime is easy to set in the System Preferences Sound panel, but you need to make two different settings if you have external speakers connected to your Mac. There is no need to use scripts or any other coding to make this adjustment.
There are both internal and external speaker output settings in the sound preference pane. In order to adjust (or turn off) the volume of your Mac's internal speakers, nothing must be plugged into the headphone jack. Keep in mind that this setting completely controls the volume of your internal Mac speakers, so if you mute the sound, and have no external speakers, you will get no sound at all from your Mac.
To adjust the volume on your Mac's internal speakers:
Unplug speakers or headphones from the headphone jack.
Go to System Prefs > Sound, then click on the Output tab.
You will then see Internal Speakers (Type built-in) highlighted in the window.
Adjust the output volume (which also controls the chime volume) in the slider at the bottom of the window. Remember if you mute it there will be no internal speaker sound.
To set the volume for your external speakers:
Plug in speakers or headphones to the headphone jack.
Go to System Prefs > Sound >, then click on the Output tab.
You will then see Headphones (Type built-in) highlighted in the window.
Adjust the output volume (which controls the chime volume in the external speakers) with the slider at the bottom of the window. Remember if you mute it there will be no external speaker sound.
http://hints.macworld.com/article.php?story=20120513121111656
Lovin my Mac but thanks for nothing Apple support and community on this very easy to adjust issue.

Recovery mode and apple logo/blue screen flashing

Hello, guys.
I'm very desperate here at the moment.
I tried to upload my iPhone 5S to iOS 8 so I could start using iCloud (I have no back up of my photos yet!!!)
It didn't work and my phone went to recovery mode. After some research, I found some programmes to exit phone from recovery mode.
The thing is even when apparently it goes out of recovery mode, the Apple logo keeps on showing in the screen for a while and then a completely blue screen flashes. And it starts again.
I put my phone back to what I think is the recovery mode (screen asking to connect to iTunes).
Anyone can please help me with that? I'm quite desperate at the moment, feels like I'm either going to lose all my photos or (worst case), my phone.
Many thanks, guys!
Rafael

I'm afraid your data is gone by now already. To get at least the phone working again, visit an Authorized Apple Service Provider or Apple Store to get the phone checked.
iPhone - Contact Support - Apple Support

With Lion I had four home screens and with mountain Lion only one

With Lion I had four home screens but with Mountain Lion I got only one ?

What's a "Home screen?"
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Error 0xe00002ca black screen after login, Mountain Lion on Macbook pro 13 inch early 2011 SSD 256 GB

After entering my pw at the login screen, I get a black screen
This started after battery got fully drained accidentally.
It has happened in the past after battery gets fully drained accidentally, and I have to reboot several times until it boots properly.
This time I tried rebooting several times but it never booted properly
Tried booting into Safe Mode, by restart Mac while holding down theShift key past the chime, until I saw the Apple logo and spinning gear. I did NOT see the spinning gear change into a solid progress bar. I also did NOT see OS X login window with the words “Safe boot” in bright red.
I Tried booting Mac’s recovery system, by restarting Mac and holding down Command + R during boot. I ran Disk Utility and theVerify Disk option did NOT find any errors. Interestingly only 16 mb was found to be available on the 250 GB disk. Note: I have filevault2 encryption enabled
Please find below the output of verbose mode. (Command-V)
com.apple.launchd.     1 com.apple.launchd.
** /dev/rdisk1 (NO WRITE)
** Root file system
   Executing fsck_hfs (version diskdev_cmds-557.3.1~5).
** /dev/rdisk1
        Using cacheBlockSize=32k cacheTotalBlock=98304 cachesSize=3145728k.
** Root file system
   Executing fsck_hfs (version diskdev_cmds-557.3.1~5).
** Checking Journaled HFS Plusvolume
    The volume name is Macintosh HD
** Checking extents overflow file.
** Checking catalog file.
CoreStorageGroup::completeIOrequest - error 0xe00002ca detected for LVG "Macintosh HD"(F2296C53..........), pv 22837757 .........., near LV byte offset = 1823211520
disk1: I/O error.
AppleUSBMultitouchDriver ::checkStatus - received Status Packet, Payload 2: device was reinitialized
** The volume Macintosh HD could not be verified completely.
Kext loading now disabled
Kext unloading now disabled
Kext autounloading now disabled
Kernel requests now disabled
com.apple.launchd.     1 com.apple.launchd.
N 20 21:05:51 2014
C
ocontinuing
m.apple.launchd.     1 com.apple.launchctl.system
done
CPU halted
I do have time machine backup.
Do I need to erase the harddisk and restore from time machine, just reinstall OS Mountain lion from internet, get a new hard disk, or do something else.
I don't know if I need to boot this Macbook from an external disk/drive and copy data or fix some minor error
PLEASE HELP !
I would highly appreciate it.

Try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode - About
Safe Mode

Black screen after login, Mountain Lion on Macbook pro 13 inch early 2011 SSD 256 GB

After entering my pw at the login screen, I get a black screen
This started after battery got fully drained accidentally.
It has happened in the past after battery gets fully drained accidentally, and I have to reboot several times until it boots properly.
This time I tried rebooting several times but it never booted properly
Tried booting into Safe Mode, by restart Mac while holding down theShift key past the chime, until I saw the Apple logo and spinning gear. I did NOT see the spinning gear change into a solid progress bar. I also did NOT see OS X login window with the words “Safe boot” in bright red.
I Tried booting Mac’s recovery system, by restarting Mac and holding down Command + R during boot. I ran Disk Utility and theVerify Disk option did NOT find any errors. Interestingly only 16 mb was found to be available on the 250 GB disk. Note: I have filevault2 encryption enabled
Please find below the output of verbose mode. (Command-V)
com.apple.launchd.     1 com.apple.launchd.
** /dev/rdisk1 (NO WRITE)
** Root file system
   Executing fsck_hfs (version diskdev_cmds-557.3.1~5).
** /dev/rdisk1
        Using cacheBlockSize=32k cacheTotalBlock=98304 cachesSize=3145728k.
** Root file system
   Executing fsck_hfs (version diskdev_cmds-557.3.1~5).
** Checking Journaled HFS Plusvolume
    The volume name is Macintosh HD
** Checking extents overflow file.
** Checking catalog file.
CoreStorageGroup::completeIOrequest - error 0xe00002ca detected for LVG "Macintosh HD"(F2296C53..........), pv 22837757 .........., near LV byte offset = 1823211520
disk1: I/O error.
AppleUSBMultitouchDriver ::checkStatus - received Status Packet, Payload 2: device was reinitialized
** The volume Macintosh HD could not be verified completely.
Kext loading now disabled
Kext unloading now disabled
Kext autounloading now disabled
Kernel requests now disabled
com.apple.launchd.     1 com.apple.launchd.
N 20 21:05:51 2014
C
ocontinuing
m.apple.launchd.     1 com.apple.launchctl.system
done
CPU halted
I do have time machine backup.
Do I need to erase the harddisk and restore from time machine, just reinstall OS Mountain lion from internet, get a new hard disk, or do something else.
I don't know if I need to boot this Macbook from an external disk/drive and copy data or fix some minor error
PLEASE HELP !
I would highly appreciate it.

Try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode - About
Safe Mode

Blue Screen Flash Upon Start-Up

I have been trying to search online for similar problem threads or solution to this but unable to find any.
Recently, I have been getting blue screen which flashes about a second (once) at the start-up apple screen, but it is not stucked, it jumped to log-in screen immedaitely or rather normally. However I do understand that it should not be a normal start-up because when I just bring this mac home I do not have this problem before.

Hi EVALCY,
Welcome to the Apple Support Communities!
I understand you see a quick blue screen before your Apple computer starts up. I would suggest a couple of different steps to isolate and resolve this issue. Use the following article as a reference.
OS X Mavericks: If you see a blue screen at startup
http://support.apple.com/kb/PH14061
I hope this helps,
-Joe

Can't Boot From Mountain Lion Startup Drive on MBP with Mavericks Installed

Hi everyone,
I'm trying to boot up my late 2013 15" MBP (shipped with Mavericks) using an external startup disk running Mountain Lion. I really need to use the FCP iChat Theater feature, as I need to do some long distance editing. The startup disk works just fine, I checked it on another computer, but when I restart my Mavericks mac and choose it as the boot drive, I just get a grey screen with the universal "no"symbol (circle with a slash through it).
Any ideas on how to get around this issue?
Thanks!

Starting up from a system version older than the original one is not supported and usually not possible.

Wireless all in one blue screen, flashing lights, help

My printer won't reboot, either all lights are flashing or after turning off than on power has printer error code 824c1800 blue screen clock with flashing blue light under camera. What do I do? I tried unplugging it, also taking out cartridges while on, disconnecting power for 1/2 hour but no go. Help please.
This question was solved.
View Solution.

1. Unplug power cable while the printer is ON.
2. Press and hold the '#' and '3' buttons, and plug the cable back into the printer.
3. Continue holding the buttons down for 20 seconds, and then release it.
Make it easier for other people to find solutions, by marking my answer with \'Accept as Solution\' if it solves your problem.
Click on the BLUE KUDOS button on the left to say "Thanks"
-Tyekey
Make it easier for other people to find solutions, by marking my answer with \'Accept as Solution\' if it solves your problem.
Click on the BLUE KUDOS button on the left to say "Thanks"
-Tyekey
I work for HP.

Login screen black on Mountain Lion

I upgraded my MacBook Pro 13 early 2011 to Mountain Lion yesterday.
I am having a problem with the login screen. About 50% of the time when I reboot, the login screen is completely blank, just plain black. The other screens I have connected show the linnen background as normal.
The login screen is there as I can login by:
pressing down arrow
pressing enter
typing my password
pressing enter
I have tried the various to try and fix it:
zapping PRAM
repairing the boot volume
repairing permissions
disconnecting my other displays
None of that did any good, it still keeps doing it.

It looks like this is being caused my the driver for my DisplayLink USB display adapter.
The driver was also causing Finder and Skype to crash.

Severe Screen Artefacts post Mountain Lion Upgrade

I recently upgraded to Mountain Lion direct from Snow Leopard. Ever since I have been getting weird vertical lines drwn on my iMac screen.
They don't appear all the time. They appear in windows when I move the window around the screen. They sometimes appear on the desktop behind the window - but not always. They appear in in Safari windows too. If I scroll up and down the line stay in the same releative position. That is, I can't lose them by scrolling them off screen. They are still there in the same shape and position when I scroll back down again.
They don't seem to affect Google Chrome. They plague Safari and Firefox. I have a demo version of iDefrag. The iDefrag data window has vertical lines at random where none should be present.
Here are some screen shots -
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/Screen%20Shot%202012-12-11%20at%2010.39.54.png
Moving a window about -
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/Screen%20Shot%202013-01-08%20at%2023.22.49.png
Sometimes the lines spill over onto the desktop behind -
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/ScreenFault.pdf
About my iMac
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/Screen%20Shot%202013-01-08%20at%2023.09.35.png
iStat Pro Report
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/Screen%20Shot%202013-01-08%20at%2023.21.40.png
Safari
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/Screen%20Shot%202013-01-07%20at%2017.24.31.png
Safari scrolled up a bit - no change if scrolled off screen then back again
https://dl.dropbox.com/u/11373233/MacDiscussions/Screen%20problems%20post%20Moun tain%20Lion/Screen%20Shot%202013-01-07%20at%2017.24.10.png
This happens irrespective of what User Account I am logged in to.

Hi Paul.
I did all that and I'm pleased to announce that it appears to have worked!! It's only been half an hour or so since the restart so I'm still cautious but I now get that Triangle in Numbers that I mentioned earlier.
The screen artifacts appear to have gone now. But I will remain sceptical about this until I haven't seen them for at least a week. Well - another couple of hours maybe. LOL!
What appears to have happened this time is that the download was one **** of a bit faster than the first time. My ISP recently upgraded me from 20gbits/s to 60gb/s download. The ML downloader showed 1 hour 36 mins to do the jobs but actually took only about 40 mins. The installer took a further 40 mins.
This time, when ML started up, it automatically located and downloaded n a new version of Java (name ended with 2013 or something). I think it was this that has fixed the screen glitches.
The reinstalled version of ML is 10.8.3. It was 10.8.2 before. Okay, so it's a recent update but I wonder why 'Software Update' didn't inform me about this? Just a coincidence that it is released just as I needed it maybe?
Anyway, I'm off now to see if GarageBand works again in all the accounts on my iMac rather than only the administrator account; and to see if edge detection when preview scanning is now available again in Preview and Image Capture when using my HP C7280 A-I-O printer/scanner. Oh, and also to see if Dictation now works. It didn't before.
Bugger! I've just typed this and possibly I needn't have done! Oh well - here goes nothing.....
Thanks for the tips, Paul. Your good health, Sir!

Cannot install flash in Mountain Lion

I tried installing the required Flash update in Mountain Lion and it refuses to let me install Flash.
I tried installing it and it sat at 95% for 30 minutes. So I cancelled it and then tried again. It got to 5% and then stalled out and said it failed.
I uninstalled the Flash installation and rebooted trying to install it again and it still wouldn't install.
It now says "Blocked Plug-in" wherever flash is required on the web in SafarI! It says I have ot update it and I keep trying but it will not let me!
Any ideas? Help?

I have the same exact problem to some extent. I can install flash all the way, but safari is not recognizing it and saying that I need to update flash (which I already did). It is not blocked in the safari preferences even though it says that it is when I try to play a youtube video. Also this pop-up box keeps appearing:
I did exactly what is says and still no luck. It keeps poping up.

Blue screen flash on Mountain Lion startup

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