After installing Mavericks, computer will not boot up.

Have gone back to previous OS, deleted and re-downloaded install file and attempted to install Mavericks 5 times to same result.
Ran disk utility, all okay.
Keep getting a screen saying that a problem was encountered on booting up, hit a key, etc. computer then re-boots and will not make it past that point.

Welcome to Discussions - which model iMac do you have? No G5 iMac takes more than 2.5GB of RAM. If you have an intel, try removing one of the sticks and see if that helps.
Please post back with results,

Similar Messages

  • Os 10.5 install failure computer will not boot

    acquired a hand-me-down G4 and went to upgrade the 10.4.11 os to 10.5. I had planned to do a archive and install because I dont have software disks for many of the applications, however, I never even got that far...
    put in the 10.5 disk, it loaded and I clicked install, it promted a restart, and hasn't booted up since.
    It just spun and spun, I thought maybe it would just take a while, so i let it run, and frankly I forgot about it and came back an hour+ later. still spinning.
    powered it down by holding the power button. turned it on again and it shut itself off...x3. I figured maybe there was a problem with still having the install disk in the drive so i used my handy-dandy paper clip and ejected the disk.
    so now it will turn on and stay on, buy just shows the old OS9 logo with the 2 faces and a question mark.
    what is going on? can i just go back? i have my 10.3 disks, but no disks for 10.4.11. (maybe that was a downloadable upgrade?)

    You may have to reinstall, but first...
    "Try Disk Utility
    1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
    2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
    Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
    3. Click the First Aid tab.
    4. Select your Mac OS X volume.
    5. Click Repair. Disk Utility checks and repairs the disk."
    http://docs.info.apple.com/article.html?artnum=106214
    Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
    (Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
    If all the above fails, then it appears to be time for an Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
    http://docs.info.apple.com/article.html?artnum=107120
    Just be sure to select Preserve Users & Settings.

  • Computer will not boot up.  I have tried running disk utility and re-installing OSX.  It says disk locked

    I am new to Macs and have bought a 13" Macbook Pro and a IMac 21.5" 14 months ago.  I have only used the Macbook pro about 15-20 times and after upgrading to Maverick it will not boot up.  I get the white screen and a spinning circle.  I have tried Disk utility repair and even re-installing the OSX, but it says disk locked.  I do not recall setting any password protections or passwords.  I now have a brick with a lit up Apple logo.  If anyone knows how I can bypass the disk lock error or reset the laptop, please let me know.  This has not been a pleasant conversion from PC's.  Even my IMac blacks out from time to time and both happened right after my factory warranty expired.

    The internal drive is malfunctioning. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
    Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.
    If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
    Keeping your confidential data secure during hardware repair
    *An SSD doesn't need to be zeroed.

  • Computer will not boot up; only rotating wheel. OS 10.7 iMac

    computer will not boot up, only rotating wheel. OS 10.7, iMac

    Bootup holding CMD+r, or the Option/alt key to boot from the Restore partitiion & use Disk Utility from there to Repair the Disk, then Permissions.
    Re-install if that doesn't work.

  • After loading Maverick iTunes will not launch.  I get an error code: -45054.  I am the administrator and have no groups or guests.  Sharing options don't fix this.  Als Fetch will not launch, I get error code: SSL error 9807.  These worked perfectly befor

    After loading Maverick iTunes will not launch.  I get an error code: -45054.  I am the administrator and have no groups or guests.  Sharing options don't fix this.  Also Fetch will not launch, I get error code: SSL error 9807.  These worked perfectly before installing Maverick.  Also everything that loads, all programs, take twice as long to load.  I have MacKeeper and have cleaned and discarded all the garbage. 

    Remove "MacKeeper" as follows. First, back up all data.
    "MacKeeper" is a scam with only one useful feature: it deletes itself.
    Note: These instructions apply to the version of the product that I downloaded and tested in early 2012. I can't be sure that they apply to other versions.
    If you have incompletely removed MacKeeper—for example, by dragging the application to the Trash and emptying—then you'll have to reinstall it and start over.
    IMPORTANT: "MacKeeper" has what the developer calls an “encryption” feature. In my tests, I didn't try to verify what this feature really does. If you used it to “encrypt” any of your files, “decrypt” them before you uninstall, or (preferably) restore the files from backups made before they were “encrypted.” As the developer is not trustworthy, you should assume that the "decrypted" files are corrupt unless proven otherwise.
    In the Finder, select
    Go ▹ Applications
    from the menu bar, or press the key combination shift-command-A. The "MacKeeper" application is in the folder that opens. Quit it if it's running, then drag it to the Trash. You'll be prompted for your login password. Click the Uninstall MacKeeper button in the dialog that appears. All the functional components of the software will be deleted. Reboot.
    ☞ Quit MacKeeper before dragging it to the Trash.
    ☞ Don't empty the Trash. Let MacKeeper delete itself.
    ☞ Don't try to drag the MacKeeper Dock icon to the Trash.

  • Computer will not boot up.   a circle with a line thru it appears.

    All of a sudden my computer will not boot up and a circle with a line thru it comes up.  What is the problem and what can I do to fix it?

    Hi, master hunter. 
    The most common meaning of this symbol is that something in the operating system is damaged.  Here is the best resource when troubleshooting this behavior. 
    OS X: About kernel panics
    http://support.apple.com/kb/TS3742
    If you prefer us to assist you with this issue, contact us here.
    Cheers,
    Jason H. 

  • Computer will not boot up on usb cd rom to repair windows problem (corrupt file) what should i do

    computer will not boot up on usb cd rom to repair windows problem (corrupt file) what should i do

    Which computer? Which Windows?
    What are you trying to do?
    -Jerry

  • Have a MacBook Pro. the computer will not boot up, the screen has black and white stripes and multi color bands as well.

    Have a MacBookPro. The computer will not boot up. the screen has black and white bands with multi color bands as well.

    Yeah it's dead. Take it to an Apple Genius Bar and have it checked out. Then buy a new one.

  • Computer Will Not Boot

    My computer will not boot and it will not enter Safe Mode. I ran the Memory Diagnostic test and it shows that I have a hardware problem. I also tried to restore my computer to an earlier time but it showed an error. I have 1GB or RAM and recently it keeps changing from 512MB to 1023MB. Please help.
    Specs (that I know of)
    1GB RAM
    INTEL CORE 2 DUO 2.43GHz (I'm not sure)
    Gigabyte motherboard
    OS: WINDOWS 7 ULTIMATE
    This question was solved.
    View Solution.

    try to make shour that the ram is snug and in all th way make shour NOT to jam them in and dont leve a empty slot in betwen them if there craced be shore not to use the in any in the computer check the mother bords slots  and the pins on the ram and make shour that theres no dust stuck in there .              thats all i can think of hope it works out for u.  :^)

  • Computer will not boot up after recent software install

    I recently tried to install a series of software updates. Not all were successful. Soon therafter the computer froze up while in safari. I turned it off and the computer would not boot up on restart, and instead sent me to the darwin login screen. I rebooted in safe mode per these forums, and turned off an itunes startup function, and then rebooted. That seemed to do the trick as I could now get back into the OS, but the computer was dreadfully slow. It froze up again in Safari and I turned it off again, and this time it would not go past the grey startup screen with the apple. I tried safe mode again, but the computer would shut down around 30 seconds after the wheel below the grey apple started turning. I Was able to get my Tiger Install DVD in the drive, and turned the computer back on, but now just get the grey apple screen and the wheel spinning indefinitely. I cannot do an erase and install because my photos are not backed up. Please help!
    Thanks

    Hi, Deaton41. Welcome to the Discussions.
    You wrote: "I recently tried to install a series of software updates. Not all were successful."I suspect the only way you are going to resolve this is by performing an Archive and Install. For important tips on this process, see my "General advice on performing an Archive and Install" FAQ. Perform the steps therein in the specified order. If you follow my FAQ's steps to the letter, then your photos should be AOK, assuming directory corruption hasn't damaged them. I suspect directory corruption is the root cause of the unsuccessful software updates, which that then led to your current problem re: start up.
    Before installing future software updates, you may wish to consider the advice in my "Installing Software Updates" FAQ. Taking the steps therein before installing an update often helps avert problems and gives you a fallback position in case trouble arises.
    Good luck!
    Dr. Smoke
    Author: Troubleshooting Mac® OS X
    Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
    I may receive some form of compensation, financial or otherwise, from my recommendation or link.

  • Installed todays security update, computer will not boot, down

    I installed todays security update. now my G3 600mhz 14" iBook, running 10.3.9, will not boot.
    I have had several symptoms throughout the day. A couple of times it sat there for about an hour with a blank screen. It came up several times with the message to type "mac-boot" ( I may be remembering the syntax wrong) I tried that, I also tried typing "shut-down" at that point.
    Later it came up to my background screen bout would do nothing and go no further. Now it is siting there with a OS 9 folder icon in the middle of the screen and sometimes the icon alternates between a face and a question mark in the middle of the icon.

    Robert,
    I sympathize with your plight. I had a similar problem with my G4 AGP (Sawtooth). Like a dummy, I installed Security Update 2006-004. Upon reading posts about Apple updates on this board, it seem that the knlowledgeable ones wait until the unsuspecting ones walk on the landmines that Apple builds into the upgrades before trying it themselves.
    I had exactly the same problems that you describe. Since I believe that my G4 has an extended warrantee, I called Apple Phone Support. The gentleman after listining to my plight, told me that he could not help me because my Mac was a "VINTAGE" model, no longer supported by Apple. How is that for an answer. I guess that now that Apple switched to Intel, all Motorola chips become "persona non-grata".
    Anyway, I remember that something like this happened to me some years back with another "upgrade". I believe that basically, the problem is due to the fact that Apple does not make provisions for third party products installed in a Mac. Last time, it was the video card (ATI) that had to be removed in order for the upgrade to work. This time, I had to remove my 2 GHz. Giga Design CPU and put back the measly 400 MHz. Apple CPU. Then I was able to boot normally. I then re-installed the Giga drivers and everything went back to normal. Since I am getting old, and it is recommended for persons of my age to engage in mental exercises, I believe Apple is trying to help me by having my brain work overtime (not to mention the 5 terror-filled hours I spent to resolve the problem.
    I suspect the update writes to or resets your PRAM or other non-volatile memory. Does your G3 iBook have any non-Apple components? If so, I suggest you remove it or them. Beyond that, I cannot help you, except to suggest that you reset the PRAM.
    I now have transferred most of my data to a fast, trouble-free (relatively) PC. Since in the future, all Macs with have Intel chips, there will be no reason for me, after about 30+ "vintage" years to buy Apple. Of course, just as Apple touts that its OS can run on a PC, PC owners will (are already) running Mac OS on their PC.
    Nick

  • Computer will not boot when I install my Sound Blaster Live Ca

    My computer wiil not boot when I put my sound blaster li've card in. Any body have any ideas that I could try?
    Thanks
    tbaker

    Turn off your pc, remove the jumper near the battary for 5 seconds, then put the jumper back.
    If it works go to BIOS and switch off (disable) Audio on Board or Sound on Board , (if you have it), then start your pc. Should work !!!
    I hope it helps!!!

  • Aperture 3 installed, now MBP will not boot

    I installed Apeture 3 and attempted to update the photo library. The computer locked up and after a hard reboot the computer will not start in normal or safe mode.

    Hi fogtownjohn,
    Try to do a PRAM reset.
    Also did you try to calibrate the battery?
    When plugged in without battery try to boot in safe-mode by holding down the Shift key after you hear the startup sound. While is safe-mode, repair permissions on disk utility.
    After, Shut down the computer, insert the battery and try to boot.
    If non of this works , then you have a faulty battery.
    Call Apple and set up an appointmeny with a Genius.
    Did your computer pass Warrenty?
    Regards,
    Andrew

  • HT1758 Power failure in the middle of a software update and not the computer will not boot up.  The computer just has a white screen with a grey apple and just loads non stop.

    My iMac will not boot up after a software update.  the screen is all whute will show a grey apple in the middle and will look like it is working but nothing happens; this can go on forever.
    Does anyone have any suggestions?

    Do you have a backup in the form of a bootable clone or Time Machine? Restore that and then try the update again.
    Some things to try here (Safe Boot)
    http://support.apple.com/kb/TS2570
    Another option might be to download the standalone from Apple Downloads on another Mac and try installing it in Firewire Target Disk Mode to the Mac that was interrupted during the update.
    http://support.apple.com/kb/HT1661

  • Hp pavilion elite e9120y pc computer will not boot up. memory could not read

    HP Pavilion Elite e9120y PC  Vista Computer wil not boot two error messages 1. instruction at 0x74d605ef referenced
    memory at 0x00000114. The memory could not be read  2. Error 0x40011002000001012 if this issues continues. Please contact HP Support

    Hi @gjtomlin ,
    Thank you for visiting the HP Support Forums and Welcome. I have read that you are interested in re-install the operating system back on your HP Pavilion TouchSmart 14-b109wm Sleekbook. Try performing a hard reset.
    When performing a hard reset please note remove any and all USB devices. Disconnect all non-essential devices.
    Here is a link to computer won't start for Windows 8.
    You might benefit from a Windows 8 refresh.
    It load defaults on the Notebook without disks. Here is a link to your drivers and software page.
    I hope this helps.
    Thanks.
    Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
    Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

Maybe you are looking for