Mac stuck at grey screen after rebooting to install windows 7

My mac refuses to start installing Windows 7 from a disc after I finish going through the "Install Windows 7" option of Bootcamp assistant. I have not got any special devices plugged in during the reboot, just a screen. What do I do with the Drivers on the flashdrive? Please someone help me.

Which specific model of iMac do you have? If the installer refused to install, then there must be a reason, such as lack of hard disk space, RAM, etc.
Did you eject the DVD, or is it still in the optical drive? If it's still in the drive, you should try booting from it by turning on the iMac and holding down the 'C' key until you see the spinning radian and see if it will boot from the DVD.
Post back with more info and results.

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Stuck at grey screen after reboot

I seem to be stuck at the grey screen after a reboot of my server. Here are the symptoms and I'm wondering if anyone has experienced them before or has some idea of where to look:
1) Over the last couple of weeks, I've noticed the entire system freezing up for 10-20 seconds. The spinning pinwheel pops up and when my office is really quite, it sounds like either a fan is starting on the system or a hard drive is spinning up. Note that I've turned off all 'spin drives down when possible' in energy savings.
2) After the 10-20 seconds, a bunch of disk activity occurs and everything goes back to normal.
I've tried repairing permissions, checking for errors with the drive, etc. I've got two drives striped in Raid 0 (yes, the system is backed up--so I'm not worried about loosing data).
After a recent software update, I had to reboot it, and that's where it got stuck. Could be something there for some time, but my server usually runs for months at a time, unless an update requires a reboot.
Thanks for any help or suggestions!

Could you be more specific about what disks you used to boot with and exactly what programs you ran...
I cannot seem to get it to boot from the "Admin Tools" disk using the "D" key.
Also, when booting from the "Mac OS X Server" disk I can access Disk Utility, but do not see Raid Utility anywhwere.

Mac stuck at grey screen after startup sound. Help

Help

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
To restart an unresponsive computer, press and hold the power button for a few seconds until the power shuts off, then release, wait a few more seconds, and press it again briefly.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If a desktop Mac hangs at a plain gray screen with a movable cursor, the keyboard may not be recognized. Press and hold the button on the side of an Apple wireless keyboard to make it discoverable. If need be, replace or recharge the batteries. If you're using a USB keyboard connected to a hub, connect it to a built-in port.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

Mac stuck on startup screen after Mountain Lion install

After installing Mountain Lion my Mac restarted and has been on the startup screen (apple logo with loading icon spinning) for the last hour... I'm assuming this means my hard drive crashed during the install? What ***** is this happened when I installed Lion the first time. Wasn't a cheap fix and lost everything.

Similar if not the very same issue with my late 2009 iMac since upgrading to Mountain Lion.
First time I've seen actual script - DOS-like text (well, Linux or UNIX or whatever it is) that only seems to appear from a cold boot.
First time this happened I held down the power button until the system restarted.
Second time around - and from a cold boot - I entered "/exit" at the prompt and the system appears to have continuted the boot process.
Someone in another post added the following:
Open console in Applications>Utilities, check the system log for the date/time of the last problem startup for clues.
...but from this I still coudn't see where the error lies. :/

Mac stuck at startup screen after snow leopard install went bad

I have an iMac running on 10.4. I have all the requirements to install 10.6.
i bought the $30 cd to install it, put in the cd and chose install. It went to screen with the black/purple space background and a window that had me choose where to install it to. I think I booted from the install CD.
Chose english, it prepared installation, clicked continue on the install mac os x window. Then i had to choose where to install it. There was only one option (the hard disk) but when i clicked on it, it said i couldn't install it. So I clicked back but I couldn't quit the installation.
When I restarted the computer, it just kept going to the installation and I kept ending up in a dead end. So, I browsed for my available options to restart my computer running on my old OS. I clicked utilities > startup disk > then clicked the hard disk. I thought this would just restart the iMac normally.
The computer restarted, but now its stuck on the start up screen. I turn it on, stays on the apple logo, then it shuts itself off within 2-5 minutes.
Am I screwed? Did I lose all my files that were on the computer? I know I'm an idiot for not backing up all my files on an external hard drive.
How do I get out of this and just use my computer?

Which specific model of iMac do you have? If the installer refused to install, then there must be a reason, such as lack of hard disk space, RAM, etc.
Did you eject the DVD, or is it still in the optical drive? If it's still in the drive, you should try booting from it by turning on the iMac and holding down the 'C' key until you see the spinning radian and see if it will boot from the DVD.
Post back with more info and results.

My new MacBook pro is stuck on grey screen after loading kies, My new MacBook pro is stuck on grey screen after loading kies

My new MacBook pro is stuck on a Grey screen after I downloaded Samsung kies on it. How do I solve this problem?

Hi there,
You may find the troubleshooting steps in the article below helpful.
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
-Griff W.

MacBook Pro stuck at grey screen after Yosemite upgrade

upgraded to yosemite yesterday. Reboot and stuck at grey screen(login in page) when i log in there is some codes thing at the left top corner of the screen. and then it reboots again. Which means I can never log onto the computer. what should I do

If you can't start up and log in in the usual way, try in safe mode.
During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Log in as an administrator to carry out these instructions. If you have only one account, you are the administrator.
☞ If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
Safe mode is slower than normal, and some things won’t work at all.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t start in safe mode.
If you're able to log in, launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
In the Console window, select
DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
Please don’t post other kinds of diagnostic report.

Power Mac G5 stuck on grey screen after swapping machine

Greetings Friends,
I have changed my two HD out of one casing to another casing. Both HD worked fine, Both machines worked fine.
I have booted up the computer and now the computer sits on the Grey apple logo, with no loading wheel. After 2 mins, the fans kick into overdrive.
It does not boot.
I have tried alt + command + P + R, but it does not work
I have tried holding ALT down on start up of the machine, which directs me to a menu where I can select either one of my HD or the start up disc that is in the optical drive. I have tried selecting all of these with no success.
I then tried to swap all the internals back to the original machine to see if it still works, and now the same problem exists. Grey screen with APPLE logo, no boot.
Could any body give me any help or direction. I love these machines and would like to continue working with one of them as soon as possible.
They are a G5, 4 GB ram, OSX 10.5.8 & the other drive is 10.5.1.
Both have been working well until today.
Thanks.

Hello, first thing that comes to mind is a BAD HDD, does the other one boot with only the one original drive? Maybe I'm misunderstanding if it was added in the second slot or not!?

Stuck on grey screen after restore

Ok, I thought I was a Mac power user until today with over 20 years using them, but I'm stumped.
I installed Lion and had the now-famous "lost user account" issue. So I "added" my old account and everything seemed ok. But when I tried to use Aperture, it couldn't find my library, which is one of the main things I use the Mac for. Not finding any solutions after quite a bit of Internet research, I reluctantly did a full restore (from 2 days before Lion was launched). The restore took literally all of yesterday. When I woke up, I was greeted with a notice saying that the restore had been successful. Great, right? Not so fast.
Since I hit restart, the machine has been stuck on the grey startup screen. (I'm typing this on my iPad)
I am about ready to break out my trusty copy of Disk Warrior, but before I do I thought I would ask the friendly folks here if you have any helpful suggestions so I don't make things worse. Thanks in advance for your thoughts.

Well, I got off the grey screen by doing a force shutdown and re-installing Snow Leopard, in case anyone else is having the same problem. I'm now in the process of verifying that everything that was on my machine is still functional before I contemplate "upgrading" to Lion again. Needless to say, I recommend regular backups. I've been doing so for a long time and have never needed the backup until now -- I'm glad I have it!

Computer froze...Now just grey screen after reboot

Hi all,
After installing leopard on my machine (1.5 yr old Macbook), it has worked fine for me since dec. Today at work, my mail froze, but unlike usual, I couldnt even force quit. So i held down the power button to reboot.
It rebooted the first time with a ´´do not enter´´ symbol.
After that, it reboots BLANK GREY SCREEN.
eeK! Help, please! I am out of the US right now in a land of very few mac repair centers. Suggestions...

I was going to suggest you maybe experiencing the same slow boot up as me.
The screen appears first blank grey for almost 2 minutes then after a protracted blue screen for another 4 minutes I finally get to the log-in.
But it appears you may have received other technical advice.

Macbook Pro 2010 OS X ML Won't Reinstall - Now Mac Stuck on Grey Screen

Two days ago I restarted my computer and it was stuck on the grey screen. I was able to enter safe mode and decided to reinstall OS X ML. It downloaded, and when it went to reinstall, I get an error. Tried several times, no luck. So I made a boot disk on a USB key, still no luck. "There was a problem installing 'Mac OS X'. Try reinstalling."
Now I cannot even enter safe mode. When I hold down the shift key, the apple icon scrolls through multiple icons. When I let go, the computer freezes.
I've checked the disk on Disk Utility and it says it's OK.
I have a disk copy of Snow Leopard, should I try reinstalling that and then upgrading to ML after?
MBP 2010 i7 2.66
Thanks!
Owen

Holding the shutdown buttom down for several seconds solved the problem. When I booted my mac again, it continued with the update. However, do you guys think my mac have taken damage of this?

MacBook Air stuck in grey screen after ML installation

Hi everybody,
I have downloaded and installed Mountain Lion on my MacBook Air (2011). After the installation the computer restarted and stuck in the grey loading screen, showing the apple logo and the turning wheel. I've left it alone for hours but nothing happens. This is still the case and I cannot find a way out.
Here is what I have tried so far:
- Reload and reinstall ML via recovery mode (twice). Recovery mode shows me that 10.8 is installed, by the way
- Restart without peripherals connected
- Reset PRAM and NVRAM
- Disconnect all cables and let the computer rest
- Diagnose and repair hard drive (showed me a message that a Java-related group has a value of 80 but should be 0. Repair was "successful")
- Safe boot (A bar appears in loading screen but disappears after it is about halfway full and I'm back in grey screen)
Unfortunately none of this worked. I have a Time Machine backup but it is located at the other end of the country (long story) and I can't access it easily.
Do you guys have any more ideas what else I could try? I'd really appreciate it.
Thanks!
B4sti

I'm having the same issue. My MacBook air is stuck on the grey screen with the apple logo. I've waited for hours. Has anyone found a resolution to this issue?

Mac stuck on white screen after booting.

My Mac boots and after the spinning wheel at apple logo vanishes it gets stuck on white screen..
I was running the following commands in terminal when my mac froze and I had to restart it.. After that it is on the white screen..
The commands I ran :
cd Applications
cd XAMPP/xamppfiles/htdocs/experiment
ls -l
sudo chmod 0644 /
And after that my Mac froze and I had to force restart by holding the power button.. After restart its stuck on white screen just before the login screen.

I am able to boot in Recovery HD.. did the repair permissions but that sudo command had affected the entire drive.. Reinstalling was the only option left..
Although I had to do
sudo chmod 0644 /Applications/XAMPP/xamppfiles/htdocs
but ended up pressing the return key just after the first "/"
Thanks for your help.

Stuck on grey screen after update

Hi,
I had my MacBook formatted about 2 weeks ago because of some software malfunction. I got the Snow Leopard installed and it was working perfectly fine until I had to update it.
I've updated the software from the Software Update pop-up and it would work fine but the latest update (October 9th) messed up my laptop.
It was an update for the SL software, two security updates, Java update and some other update I can't remember. All of them required a restart and I clicked to proceed.
The computer closes everything to go into restart and starts installing the software before it shuts down. Once it starts up, I get the start up chime but it stays stuck on the grey screen with the logo and the spinning wheel at the bottom. Its been stuck like this for a good 45 mins.
I shut it down by holding the power button and restarted it but it's stuck on the same screen as before.
What's wrong with it?

Start by trying this:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger, Leopard or Snow Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
If you are still unable to start then reinstall Snow Leopard. This will not erase your hard drive or disturb your data.

Stuck at blue screen after reboot

Hey,
I've just installed latest updates for my OS, restarted and I'm stuck at the blue screen (with the "loading" circle in the middle).
How can I solve this?
Thanks!

Did you try restarting in safe mode? I found this to work when I get a blue screen on reboot after an update.

Mac stuck at grey screen after rebooting to install windows 7

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