My I mac 27 late 2009 will not start up I get to the grey screen with the mouse cursor but it stays that way. if I press shift during the boot i works into safe mode. any idea?

It gets to the grey screen and the mouse point sometime show up but noting more.
when I press shift it does load up into safe mode
i re-installed lion no changes

Restart you Mac holding the "Control + R " keys then run the Restore feature.

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TS2570 Mac will not start up after software up date, just screen with Apple logo and spinning icon?

Mac will not start up after software up date, just screen with Apple logo and spinning icon? I have tried safe start up, unplugged all other cables, no luck?

How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
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.
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3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
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Firefox will not start and I get firefox.exe Application Error with the code 0x00000000, I've tried reloading but always get the same error message!

Firefox will not start, I've tried opening in safe mode, no joy. I get the firefox.exe application error 0x00000000
== This happened ==
Every time Firefox opened
== Possibly after a windows update ==
== User Agent ==
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Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
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My MacBook pro will not startup. I get a blank grey screen no logo appears so I can't chooseadiffer t drive nor boot from DVD. Safe mode and verbose mode also don't change blank screen.

It was running slow with the colored spining appearing often. This started happening weeks ago with Yosemite so I formatted the disk with the DVDs that came with the mid 2011 MacBook pro, 10.6.8. I then installed Yosemite on an external drive and this morning i was booted from the external hd with Yosemite and it stopped recognizong mouse clicks so I forced a restart and now I'm stuck with the blank grey screen. Safe mode and verbose mode also do not work.

Lao Bo,
yes, you can locate and copy a file from your HD to a USB key using UNIX commands. If you know the exact name of the file which you’re trying to locate, try this:
find / -iname filename -print
This command will search your entire internal disk for the particular filename. If you know that it’s within a particular user account, then you can save search time with this variation:
find /Users/username -iname filename -print
Either variation of this command will print all files found which have the given filename. Presuming that you’re able to identify the correct file, you can copy it to a USB key using the command
cp -p filename_returned_by_find /Volumes/USB_volume
If you’re not sure which volume name your USB key has, this command will show you what the possibilities are:
ls /Volumes
Please let me know if you have any trouble with these commands.

Mac book pro will not start apple logo spining wheel then gray screen then a circle with a line through it

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This thread has been moved to another message board. Click the link to jump to its new location.

Which model MacBook Pro (e.g., 15" late 2011)?
Clinton

My macbook pro will not boot. It gets the grey screen with the apple until the bar is half way across and then shuts down. The only screen I can get to is in safe mode and I don't know what to do with that

my macbook pro will not boot. It gets the grey screen with the apple until the bar is half way across and then shuts down. The only screen I can get to is in safe mode and I don't know what to do with that

Mac OS X: Gray screen appears during startup - Apple Support

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I have no idea how much it will cost to repair. I don't even know what the exact problem will prove to be. It may be quick if it isn't a motherboard problem. I just don't know. Take it in for a service diagnostic, then they can tell you what is involved.

My mac book pro will not start, i hear the fan sometimes but nothing else

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What is the exact model of your Macbook Pro?

Mac Book Pro will not start on Battery Power

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What is the exact model of your MBP? The date change often is an indication of power loss to the MBP, such as disconnecting the battery.
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Ciao.

Just loaded Yosemite on my Mac and Illustrator will not start-up?

Just loaded Yosemite on my Mac and Illustrator will not start-up?

Reinstall the software and also read this:
http://helpx.adobe.com/dreamweaver/kb/dreamweaver-java-se-6-runtime.html
Mylenium

I have a Macbook and I left it unplugged. It started up slowly when I plugged it in again, but it seemed fine. Once it started charging I shut it down so it would be easier, but now it will not go past the grey screen with the apple. What do I do?

I have a Macbook and I left it unplugged. It started up slowly when I plugged it in again, but it seemed fine. Once it started charging I shut it down so it would be easier, but now it will not go past the grey screen with the apple. What do I do?
I have Snow leopard on my computer, and I tried to do a hard restart as an article suggested, but it did not work. I also tried cleaning out the PRAM.
The only things I did last night:
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Before doing a reinstall, which may not be needed at this point,
Try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk.
You could have some directory corruption. Let us know what errors Disk Repair reports and if DU was able to repair them. This could just be a start in repairs and you may need a better utility to finish the job.
Then Repair Permissions.
No need to report any Permissions errors........we all get them.
 DALE

Just downloaded and installed new LR CC. No apparent problems with the D/I on my iMac, OS 10.10.3. however LR CC will not start. I get a momentary flash of the opening screen and then the program shuts down. From the posts it looks like this if a ver

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Help, got an iPad 2 and it will not turn on? Just got a blank screen with a apple logo. Tried restore (I.e. holding down both buttons for 10min) iTunes also does not recognise iPad when connected to mac?

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My Macbook aliminium unibody from late 2008 will not boot. I reach the grey screen with the apple icon and the spinning grey gear. I used disk utility to boot it but it said integrity test failed. I don't know what to do can anyone please help?

My Macbook aliminium unibody from late 2008 will not boot. I reach the grey screen with the apple icon and the spinning grey gear. I used disk utility to boot it but it said integrity test failed. I don't know what to do can anyone please help?

Sounds like you may have a harddrive issue. You are probably going to need to get that changed out and then install the OS X again to get it going.

My I mac 27 late 2009 will not start up I get to the grey screen with the mouse cursor but it stays that way. if I press shift during the boot i works into safe mode. any idea?

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