My mac book pro is frozen on a grey screen with an apple in the middle. It is not responding to restarting and has white letters that says panic(cpu caller 0xffffff8027259241) and so on

panic(cpu 0 caller 0xffffff8027259241) : "Unable to find driver for this platform: \ "ACP\".\n"@/SourceCache/xnu/xnu-2050.20.9/iokit/Kernel/IOPlatformExpert.cpp:154 8
Debugger called: <panic>
Backtrace (CPU 0), Frame : Return Address
0xffffff80a0b1bde0 : 0xffffff8026e1d626
0xffffff80a0b1be50 : 0xffffff8027259241
0xffffff80a0b1be60 : 0xffffff802723081b
0xffffff80a0b1bea0 : 0xffffff802723033e
0xffffff80a0b1bf30 : 0xffffff802722c2d0
0xffffff80a0b1bf70 : 0xffffff8027230e99
0xffffff80a0b1bfb0 : 0xffffff8026eb2957
BSD process name corresponding to current thread: Unknown
Mac OS version:
Not yet set
Kernel version:
Darwin Kernel Version 12.2.1 : Thu Oct 18 16:32:48 PDT 2012; root:xnu-2050.20.9~2/RELEASE_X86_64
Kernel UUID: 0AFA55FD-872F-3BBE-214EB586A16D
Kernel slide: 0x0000000026c00000
Kernel text base: 0xffffff8026e00000
System uptime in nanoseconds: 507642361

Press the Power button and hold it down until the computer turns off. Restart. Do you still get the same result? If so, then try booting into Safe Mode, then restart normally. A safe mode startup takes considerably longer than a normal one, so don't panic. You will also see a progress bar at the beginning.

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Press the Power button and hold it down until the computer turns off. Restart. Do you still get the same result? If so, then try booting into Safe Mode, then restart normally. A safe mode startup takes considerably longer than a normal one, so don't panic. You will also see a progress bar at the beginning.

My MacBook won't start up. After turn it on I get a grey screen with an apple in center and a circle below with lines around it and a blank bar below that. How can I get it to get beyond this screen?

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I have the exact same problem and waited it out and got to my homescreen. Whateve the problem is fried my bluetooth and my trackpad. I tried starting it again and couldn't even get to homescreen, it stayed on the bluescreen with the wheel of death. So, I took it to genius bar today. I was informed that my logic board is fried and it needs to be replaced. $300 repair that I'm looking at...

I start my mac book pro and the screen goes white with an apple in the middle

I start my mac book pro and the screen goes white with an apple in the middle. Starts like charging but then it turns
off again

Reinstall Snow Leopard without erasing the drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard 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 Utilities menu. 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.
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.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Reinstalling Lion/Mountain Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. 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 main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
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HT1338 I bought my mac book pro from an owner selling. I created my apple ID but whenever I try to download updates it brings up previous owner's apple ID and asks for password. How do I delete existing apple ID and use mine.

I bought my mac book pro from an owner selling. I created my apple ID but whenever I try to download updates it brings up previous owner's apple ID and asks for password. How do I delete or by-pass existing apple ID and use my created apple ID and password to enable updates for my Mac?

Yes, he purchased Mountain Lion on his Apple ID. It is licensed to him. What he should have done was erase the HDD and install the system that the Mac shipped with. Erase and re-install either from Recovery Partition or the disks the Mac originally shipped with. Then, purchase ML with your own Apple ID and install.

HT2486 can I have two contact lists on one mac book pro? I need one to sync with my iphone, one to sync with my husband's iphone.

can I have two contact lists on one mac book pro? I need one to sync with my iphone, one to sync with my husband's iphone.

I agree with Chris CA that this is the way I would *expect* iTunes to behave.
When I look at iTunes from my account (my music is in ~/Music/iTunes/ and not available to my spouse's account), I can see in my music library all my rips and my purchases, just as I would expect. I can use Store>View My Account (<myAppleID>) and all is as expected. Home sharing is NOT on.
Doing the same from the other account is not much different, actually. Nothing in the library yet, of course. Store>View My Account (<herAppleID>) also works. I CAN authorize my computer to play her music. I CAN view her iTunes purchases. When I attempt to download the purchases to HER library, though, I get the following dialog box:
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Problems with volume when streaming a Netflix movie from my Mac Book Pro (Mid 2009) to my flat screen TV?

Hi!
Does anyone know what I need to do in order to turn up the volume when I’m streaming a Netflix movie from my Mac Book Pro (Mid 2009) to my flat screen TV?
I hooked up the HDMI adapter from my Mac to my TV and it is currently in Mirror Mode, but I can’t turn up the volume, the only audio I’m able to adjust is on my Mac.
I’ve already tried: System Preference > Sound > Output > Internal Speakers Built in output. That’s the only option my Mac gives me.
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Hello jguti,
Thanks for using Apple Support Communities.
I understand that your external display connected via HDMI is not being detected by the computer. At this point, the best bet for your next troubleshooting step would be to reset the system:
Reset the system
You can reset the Mac's parameter RAM and SMC.
Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
Take care,
Alex H.

Why is my mac book pro mid 2012 display green flickering screen?

Why is my mac book pro mid 2012 displays green flickering screen? I was able to return the screen back to normal after i turn the lid up and down.
Is this a hardware issue ? should i return to applestore since the warranty still valid?

It seems like your display is damaged. As your computer is in warranty, take your Mac to an Apple Store or reseller to get the display replaced for free, as it's in warranty

I have backed my Mac Book pro up to my external hard drive using time machine. My iPhoto now does not show any images, even when I upload from my iPhone

I have backed my Mac Book pro up to my external hard drive using time machine. My iPhoto now does not show any images, even when I upload from my iPhone

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I need a link to buy online battery for Mac Book Pro 15" late 2008. Can't find this battery in the Apple Store...

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The only place that you can get an Apple battery is from Apple. All of the counterfeiter's will claim that they have an OEM battery for the simple reason so that they can fool you in purchasing from them.
At least from OWC you know exactly what you will be purchasing and they have a one year warranty. I have purchased two from them, one for my 2006 MBP and one for my 2010 MBP.
Ciao.

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Ipad locked up while trying to do an update. Don't know how to fix and can't use ipad at all. Black screen with itunes app in the middle of screen and it shows picture of charger that it wants me to plug in. Nothing works.

You are in recovery mode, you need to restore it through iTunes on your computer. Follow the article you linked from.

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Has anyone else had this problem.

See if you can boot in Safe Mode then delete the two apps set to launch when you startup from System Preferences / Accounts - Login Items.
Mac OS X: Starting up in Safe Mode
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The USB ports on my 30" Cinema HD display appear to not work. The monitor has not been used for almost a year, when I upgraded to a new Mac Book Pro and the 27" retina display. Now I need to move the computer back and forth between two locations using the two displays. The need for operating USB ports is essential. Any ideas. The display appears entirely normal. Am running OS X 10.9.

Disregard, problem solved.

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Doesn't work for your MBP.

My mac book pro is frozen on a grey screen with an apple in the middle. It is not responding to restarting and has white letters that says panic(cpu caller 0xffffff8027259241) and so on

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