Lost boot problem os x lion 10.7.5

i suddenly lost my OS X lion 10.7.5 on my hard drive, my macbook cannot boot again but my data is still on my hard drive question : please can someone give me a clue how do i fixed my boot problem.. thx^^

Try starting up your Mac while holding down the Command + R keys so you can access the built in utilities in OS X Recovery to repair the startup disk if necessary or restore OS X.
You can restore from a backup using Time Machine in OS X Recovery.

Similar Messages

  • I have big problems with mountain lion. you can not have a boot disk system I resulted in the need to re-download the os from scratch impiegandoci 8 hours, it is outrageous even with windows 95.

    I have big problems with mountain lion. you can not have a boot disk system I resulted in the need to re-download the os from scratch impiegandoci 8 hours, it is outrageous even with windows 95.
    at least that the operator has confirmed to me that he called me. I also have problems with either the start of the mac with the power off. I can not understand if it crashes or is just very very slow.
    Finally, I have a problem with the external hard disck. I often said to have been ejected incorrectly (not true) and I start to restore the startup recovery disk because disk utility is ineffective from the normal operating system .. is a shocking thing, but how you reduced. in four years it had never happened. seem to have windows or worse. Wake up.
    I am an Italian, alas, and then I would like an answer to my language because my € are the same as German French or English.

    You are on Windows 2000, you do not have a "Firefox" button, and should consider yourself to be fortunate in that you still have menus and don't have to do anything to get the menus back instead of the "Firefox" button. (The same applies to Windows XP users).
    Use the "File" menu to get to Import. You are not on Windows 7 or Vista, and don't have to put up with the nonsense added for Aero.
    If you want the "Firefox" button you can get it with View -> toolbars -> (uncheck) Menu Bar. The menu bar and the "Firefox" button were supposed to be mutually exclusive (which is impossible in some cases without being incompatible).
    Once you are using the "Firefox" button ...
    Use the "Alt" key to view the menu bar (temporarily) containing File, Edit, View, History, Bookmarks, Tools, and Help. On Windows 7 and Vista, the menu bar was hidden by default in Firefox 4 and above. These menu items are more or less available under the "Firefox" button which has the most used of the built-in Firefox menu items available in a different format.
    To get back to having menus again. "Firefox" button -> Options (second column) -> (check) Menu Bar
    You can make '''Firefox 7.0.1''' look like Firefox 3.6.*, see numbered '''items 1-10''' in the following topic [http://dmcritchie.mvps.org/firefox/firefox-problems.htm#fx4interface Fix Firefox 4.0 toolbar user interface, problems (Make Firefox 4.0 thru 8.0, look like 3.6)]. ''Whether or not you make changes, you should be aware of what has changed and what you have to do to use changed or missing features.''
    * http://dmcritchie.mvps.org/firefox/firefox-problems.htm#fx4interface

  • Problem with Reinstalling Lion on macbook pro.

    Hi I have a problem with reinstalling the Lion but because i had snow leopard so i can't sign in to reinstall can u help me please. Thanks

    If you ever do redownload OS X from the Store, save the package first, you can then use that to boot from and do clean installs locally.
    How to make a bootable Lion or ML install drive
    http://osxdaily.com/2012/07/25/create-os-x-mountain-lion-boot-dvd-usb-drive-lion diskmaker/
    https://www.macworld.com/article/1167857/how_to_make_a_bootable_mountain_lion_in stall_drive.html
    http://blog.gete.net/lion-diskmaker-us/
    Create an OS X Mountain Lion Installation Boot DVD or USB Drive with LionDiskMaker
    Jul 25, 2012 - 11 Comments
    http://osxdaily.com/2012/07/25/create-os-x-mountain-lion-boot-dvd-usb-drive-lion diskmaker/
    Mountain Lion is out! You can upgrade a Mac right out of the App Store, but some people prefer to make a boot disk. If you’re in that group, rather than making a bootable OS X Mountain Lion installer yourself the old fashioned way, you can do it all in a few clicks with the help of a free app called LionDiskMaker.
    After you’ve downloaded the OS X Mountain Lion installer from the Mac App Store, launch LionDiskMaker and it will locate the installer app, extract the disk image, and then make the boot disk. It’s about as simple as it gets.
    For burning a boot DVD you will need a 4.7GB or larger blank DVD and a SuperDrive. For USB install drives or SD cards the drive needs at least 8GB of space available. LionDiskMaker formats the drive you point it at, remember that when you are picking a disk to make bootable for the installer.
    Get the newest version of LinoDiskMaker free from the developer
    Making a boot installer is really helpful if you need to install Mountain Lion on multiple Macs and don’t want to re-download it on each Mac from the App Store, or if you want to perform a clean install. If you don’t need the bootable aspect, you can also just copy the Installer app file from the /Applications/ directory to other Macs and it will work to perform the OS X upgrade too.
    LionDiskMaker has been around since Lion but it has recently been updated with Mountain Lion support, heads up to CultOfMac for the reminder

  • I have a problem, i bought lion but when i want to install he said me i need to "download osx lion server" i'm running with the last lion beta. how to update please?

    i have a problem, i bought lion but when i want to install he said me i need to "download osx lion server" i'm running with the last lion beta. how to update please?
    ps: sorry for my english :S

    You apparently are using a version of OS X you did not purchase using your Apple ID. Although you can download Mavericks you cannot install it over your current system. You must repartition your hard drive, then reinstall the version of OS X originally installed when it came new from the factory. That would be on the installer discs that should have come with the computer. If the computer did not come with discs from the factory but OS X was pre-installed (Lion or Mountain Lion) then you can perform an Internet Recovery:
    Install Mavericks, Lion/Mountain Lion Using Internet Recovery
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
    Boot to the Internet Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
    Partition and Format the hard drive:
    1. Select Disk Utility from the main menu and click on the Continue button.
    2. After DU loads select your external hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.
    Reinstall Lion/Mountain Lion. Mavericks: Select Reinstall Lion/Mountain Lion, Mavericks and click on the Install button. Be sure to select the correct drive to use if you have more than one.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

  • Possible problem downloading Mountain Lion

    It appears that a few people have had problems downloading Mountain Lion. Search for title
    mountain lion not downloading
    Since Apple does not provide a DVD disk or any other media for installing the operating system, I am wondering if there is some sort of Checksum that comes with the downloaded file like a PGP signature or MD5 hash? Because if pepople are having problems downloading the Mountain Lion OS that means there is a possibility of corruption of the software after downloading.
    How can you confirm the software is completely intact and valid?

    One of a few exaples show is a Apple Discussion post called
    Mountain Lion Download Lost
    There are others and I would have to wonder with the time it would take to download the Operating system (and in some cases cost) why is there no physical media?

  • Macbookpro a1297 boot problem

    I bought an old macbook pro 17 inch a1297 and later found that it did not have hard drive. So I installed a new blank hdd n installed mountain lion. Laptop works fine but with a boot problem. I always have to disconnect the battery connector from the board and reconnect to get it worked. If I do not do this, laptop keeps giving start up tone.
    Even when laptop goes to sleep mode, it does not come up. Please help. I will be very grateful.

    Hold the option key when powering up. You should then be able to select Windows to boot.
    You should also visit the Boot Camp forum here. http://discussions.apple.com/category.jspa?categoryID=237

  • I have Problem installing mountain lion ?

    i have Problem installing mountain lion. as lost of documents during downloading !
    i did redownload Many times.
    and the same  Message !

    Thank you mr. Carolyn Samit
    1- that message say : during download mountain lion from app stor the mountain lion did not download complitly
         There are missing documents. I did softwere update and get 2 new updates, then i reinstall the mountain lion agen.
        After all its worked so i Decided to follow the installation steps.
    2- after installation complete it Request to do restart.
         I did restart to finsh up the installation i get a message in the start up Page
           I will try to show you an imeg but now i will raet it
    Install Failed
    Os x could not be installed on your conputer
    ⚠
    Os x Mountain Lion couldn't be installed, because the disk Macintosh HD is damaged and can't be repaired.
    Click Restart your computer and try instaaling again.
    This message snte by iphone

  • Why am I having problems after downloading Lion?

    My computer is constantly freezing up and getting the spinning beach ball. Also will not accept my passwords. I never had these problems until downloading Lion.

    Please read this whole message before doing anything.
    Boot in safe mode. The instructions provided by Apple are as follows:
    Be sure your Mac is shut down.
    Press the power button.
    Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
    Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
    During startup, you will see "Safe Boot" on 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.
    Safe mode is slower than normal, and some things won’t work at all, possibly including wireless networking.
    Launch some applications and test. Same problems?
    After testing, reboot as usual (i.e., not in safe mode.)

  • K7N2 Delta-L: Strange cold boot problem & solution

    My K7N2 Delta-L has a problem cold booting when the vcore is set in the bios at 1.65v of higher. After a cold boot, you get a blank black screen. I noticed that even if you run at default speeds but set the vcore to 1.65v of higher the problem still occurs. There is no problem rebooting however.
    I found the following solutions:
    1. After you power up and get a blank, hit the reset button.
    2. Don't unplug your PC. My PC is connected to a AVR and after I power down the PC I usually turn the AVR off. If i do this, than the computer will have a booting problem if I try to boot it up 30 minutes later or so. Now if I don't unplug it/power off the AVR than everything is fine.
    I don't understand why it acts the way it does though.
    Does anyone know of any other solutions?

    Have you cleared the cmos. If you do be sure you have the power turned off don't move the cmos jumper with the power on.
    I found that turning off power at power supply and unpluging, than turning on the computer the fans will spin just a little this drains all the power. Clear cmos 2-3 than return to
    1-2 position.
    Than plug the power back in and turn it back on, than try the computer again.

  • Mid 2006 iMac Boot Problem (Since latest firmware update)

    I have a Mid 2006 17" iMac. Ever since the latest firmware update in early December, about every other startup I've been having boot problems. After the white screen with the Apple Logo and the spinning wheel it goes to a blue screen like normal, but instead of the 'Loading Mac OS X' white window popping up it stays blue and the spinning loading wheel starts. I've left it loading for quite a while before and nothing changes. I have to do a force shut off by holding the power button. and then I start it up and it will boot normally.
    Any help would be appreciated.
    Thanks!

    Actually, I think it'san early 2006.

  • 1st series iMac G5: Booting problems, kernel panics, waking from sleep...

    Specifications of the iMac described: 1.8 Ghz, 1GB, 80GB, 64 Mb Nvidia VRAM, Airport, 10.5.5
    Back in August 2004 my dad bought us kids an iMac G5 for ‘family use’. It had a fresh install of 10.3.5 on it and compared to the (1999) iMac G3 it replaced it was amazingly fast.
    The iMac never showed any signs of probable issues, until we decided to upgrade to Leopard in January 2008. Initially, this upgrade was only meant to be able to sync with the latest iPod nano (who demanded a newer version of iTunes).
    After the installation the first thing I noticed was a high CPU usage, the machine seemed slower than ever and that with 1 Gb of RAM (the minimum sys. req. for Leopard are 512 Mb of RAM). Anyway, then the real thing started, it wouldn’t turn on anymore. We brought it to an Authorized Apple Reseller, the Tech department said the Logic board had failed. The costs of the fix weren’t the worth the computer anymore, so...end of story. The iMac was indeed one of the bad series, although it hadn’t any swollen capacitors.
    My dad already made up his mind and bought himself a Macbook. He then told me that if I was able to get the broken iMac fixed, I could keep it. And so, I bought an ‘as-is’ logic board on Ebay. Last weekend I installed it, and it actually seemed to work! Yet, the problems are during the startup: the first thing I see is a screen full with horizontal lines flickering all the time, like an old TV with bad signal. Mostly it won’t boot and I get the message to restart the computer (kernel panic, I got dozens of logs already!). Sometimes it got stuck during booting (grey apple screen with gear in the middle) making the fans go crazy (after a while) and sounding what others describe as a ‘jetliner taking off’ sound. Sometimes the screen remains black. Generally it takes me 5 to 10 minutes to start up properly. Maybe it’s just me but it seems like when the computer has warmed up a little (by turning on and off on and on) starting up gets smoother. I mean the startup screen suffers from less horizontal flickering lines.
    During the use of Leopard, I again get high CPU usage, especially when I use multiple programs at the same time, or when starting multiple programs. My iStat Pro said once that the fans were running at 4700 rpm and the heat of the CPU was about 70 Celsius. If I really want to **** my iMac off I should play a racing game. That just totally freaks him out! These problems could probably be solved by adding more RAM. Right?
    The iMac also has a sleep problem. Sometimes after lets say an hour or so, you can’t get it out of sleep mode (by manipulating keyboard and/or mouse, the sleep light stops, but the screen stays off --> only solution is to restart). What happened to me once was that it slept so long that it just got into a deep sleep by turning itself off completely!
    Here’s a list of what I tried so far:
    - Disk Utility: Resetting the permissions, no problems were found.
    - Resetting the SMU, both on the logic board itself as by pressing the power button 5 - 8 seconds, no improvements.
    - Resetting the PRAM, no improvements.
    - Did the Hardware test of the original install CD, nothing was found, all good.
    - Did Archive and Instal, this actually messed my system entirely, cause it wouldn't boot at all and when starting up from the Leopard installation DVD it wouldn't recognize the Macintosh HD.
    - Did Archive and Instal with the original disks, this disk did recognize Macintosh HD and so I installed the original system, 10.3. Booting problems and those flickering lines are still there though.
    Next phase will be erase and install, but first I want to know what you guys think about all this.
    Oh eh, One more thing; The guys at Applecare (phone support) told me that the replaced logic board was also out of warranty and so they couldn’t help me. But as the man on the phone was kind, he told me to go look for a special ‘driver’ on the net. He said that the driver should be able to resolve some of the issues described. He said that I had to give in the name of the LB on google and look for results. Is this bogus? Because I haven’t found anything useful on google so far. What’s the name (rather than a number) of the LB in the first place?
    I hope you guys can give me some answers. I'm kinda desperate. But I still feel there's hope...

    The symptoms of a flakey power supply are sleep problems and you have done all the right things as far as resetting the SMU and PRAM. Your CPU usage can be tracked by going to Utilities>Activity Monitor - look and see what is hogging the memory. The flickering lines could also be an optical system going south.
    The other thing you can do is run DiskWarrior or TechToolPro to see if you have corrupted directories. Preferential Treatment will let you check for corrupted preferences.

  • MSI P45 Neo-f with intermittent boot problems

    Current system:
    *CPU: Intel core2duo 4300 1,80GHz
    Mobo: MSI P45 Neo-F LGA775
    *Memory: 1 Kingston 1GB PC2-5300 667MHz DDR2 and 1 Dane-Elec 1GB PC2-5300 667MHz DDR2
    Videocard: Club3D Nvidia 8800GT 512MB GDDR3
    *Hard drive: 120GB IBM deskstar 7200rpm Ultra-ATA/100 (yes I realize it is known as the deathstar, but it hasn't failed so far, I do back-up because I'm paranoid
    PSU: Real Silent Nexus NX-5000 500 watt
    *Soundcard: Soundblaster Audigy
    OS: Windows XP home, service pack 2
    *Lite-on IT dvd-rom drive
    *floppy disk drive
    I also have 3 case fans spinning away in a marginally large Chieftec Dragon tower.
    The parts I marked with an asterisk (*) are parts that I removed from my old rig and re-used.
    I'll try to give a clear rundown of my problem and the steps I've taken so far.
    3 days ago I acquired the P45 Neo and installed it into my system, together with the 8800GT videocard. I was still using my old PSU, a Chieftec 360watt. This PSU served me well for 7 years, but it was starting to build up noise while trying to keep up games on my old rig.
    I had some trouble getting the system to boot, I tried changing some of the 4 pins wires going to the hard drive and the dvd drive. I don't know if it was luck or if I managed to divide the load properly for the system to boot. But I succeeded into booting up, got into the bios and eventually installed WinXP.
    As soon as it was time to install the videocard drivers, it stopped responding. I assumed it was a power issue, since I could only install the 20pin and 4pin cpu, but my Chieftec PSU didn't have a 24pin plug to the mobo - and it needed replacing anyway! So I bought a new 500watt PSU that had all the required plugs and more wattage.
    I installed the new PSU, checked every connection and pressed the power button. 'Lo and behold, the computer starts up. I install the videocard drivers and it proceeds with no problems. I try to install the soundcard, but the cd says I don't have one installed. I fix that by going to the System list and install the drivers from there. I install a firewall. By then I have successfully rebooted the computer 3 or 4 times. I decide all is well and turn off the computer. But I realize I wanted to check up something on the internet.
    I press the powerbutton. The PC power light go up for just a fraction of a second. I can see the blue LED of one of the case fans switching on just as briefly - then it goes out. The computer keeps trying to turn itself on. It looks like it's hickupping to try and boot!
    I turn off the PSU power on the back-side because the computer keeps trying and wait for a bit. After 10 minutes, it still doesn't work. I leave the computer for a bit and return an hour later. The computer then starts up with no problems. I turn it off after a few hours, do a reset, start it up, no problems. But then the next day it happens again.
    It's pretty tough figuring out what the problem is because it looks..almost random. I considered it could be a heat issue, but sometimes it *does* start up just after it's been turned down. Checking the bios shows no strange temperature shifts.
    Hope anyone can help me, because I do not want to go back to my old Asrock mobo

    While powered down I cleared the cmos data, removed the Dane Elec DDR2 module and set the bios to optimized defaults. Computer restarted to WinXP with no problems (it has been off the whole night). I shut down WinXP, wait a few moments and then turn the computer back on. Alas, it won't start and starts hick-upping. I turn power off at the PSU again, so it stops.
    Now I try switching out the Kingston module instead. By now the computer has been off for 10 min (while I write this entry on laptop). I press the power button on the PSU and then the power button on the front. There is a short pause, lasting a second. The computer turns on, longer now, but it only lasts 2 whole seconds before it turns off again and goes on again (I believe now you can call it powercycling). It repeats this process until I shut off the PSU.
    I check to see if I have installed it properly and try again but it starts powercycling again.
    15 min pass, I put the Kingston module back in, press the power button and voila, this time it does start. WinXP shows up, no problems. I leave it on for a bit and then shut down. And when I press the power button again - the feeling of dread returns, when it starts hickupping again.
    I'm going to see if I can install one of the memory modules from my housemate. Then hopefully tommorrow, I'm going to try if I can test a different PSU, since I see someone else on the forum - who recently posted, has the exact same power supply and also has boot problems, coincidence... or not ^^;.

  • I have an early 2008 Mac Pro, which has re-booting problems. Also what does the spinning beach-ball indicate?

    Hi, I have an early 2008 Mac Pro which has re-booting problems.
    Processor speed is: 2.8
    Memory: 2GB 800 MHz DDR2 FB-DIMM
    2 x 28GHz Quad Core Intel Xeon
    I am running OSX Yosemite Version 10.10
    My Mac Pro keeps re-booting. Last year I had to replace my graphics card. My original card was the ATI Radeon HD 2600 XT 255MB, and that is what I have now. At this precise moment my Mac Pro is running perfectly, except that it is slow and the spinning beach-ball keeps appearing. I have managed to do some work with the disk utilities, verifying, cleaning and partitioning. Some errors were found and when it was cleaned this seemed to help my Mac Pro to function properly. Although I am able to use my Mac Pro now, from day to day I still experience re-boot problems. Also quite unexpectedly my mac dictionary has an error, it closed itself down and will not open at all, I had the message to say that a report will be sent to Apple.
    I have tried starting my computer with an external hard drive fitted via a USB cable, I use for back-ups. This worked and I was able to wipe my hard drive clear and replace all info from the back up I had done only a few days ago.
    This worked for a few days and then the same problem started again.
    I am beginning to wonder if I need to buy a new hard drive.
    If there is anyone who has some answers to help me solve my problem, I would be most grateful.
    Robert

    When you have the beachball activity, note the exact time: hour, minute, second.  
    These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
    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 and start typing the name.
    The title of the Console window should be All Messages. If it isn't, select
              SYSTEM LOG QUERIES ▹ All Messages
    from the log list on the left. If you don't see that list, select
              View ▹ Show Log List
    from the menu bar at the top of the screen.
    Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
    Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
    Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
    The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
    Please don't indiscriminately dump thousands of lines from the log into this discussion.
    Please don't post screenshots of log messages—post the text.
    Some private information, such as your name, may appear in the log. Anonymize before posting.

  • Windows 8.1 pro boot problems

    I upgraded my OS on a hp pavilion g6-1d73us from windows 7 home premium to windows 8.1 pro and ever since I have had boot problems. I took all the software off since I thought that might be the problem but the boot problems persist. The computer's self diagnosis helps but I still have problems. Is my laptop incompatible with windows 8.1? Windows 8.1 was a download and I still have recovery disks for windows 7. I originally thought the problem was incompatible software but now I am not sure.

    Hi @hifive11 ,
    Thank you for visiting the HP Support Forums and Welcome. I am glad you have recovery disks for windows 7, smart thinking. I have looked into your issue about your HP Pavilion g6-1d73us Notebook and having issues with the Windows upgrade to 8.1. Here is a link to the drivers page for your product. I do notice there are drivers for Windows 8.The Updates you need for the system are the Chipset. These are located on the driver page link above.
    One of the things that can cause an issue is things connected USB. The computer can not load the drivers so it causes an issue. Once the machine is up to date then return the USB devices.
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    You can do a system restore. System restore will help if something automatically updated and did not go well on the Notebook.
    Please note remove any and all USB devices. Disconnect all non-essential devices.
    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!

  • The mother of all re-boot problems.

    Hi All,
    I've got that re-boot problem that seems very common but the solutions out there aren't working.
    Basically the computer will turn on, chime, grey screen comes up, shortly after apple logo, and then the gear starts turning, about 2 minutes later restart, process repeats.
    I've tried.
    - Booting from CD/Recovery Disk - Won't happen
    - A million different key combinations, I've read about 10 different posts on key combinations and tried them all, including PRAM reset, boot from different source, etc.
    Basically it's like my keyboard commands aren't being heard at all, but to test if the keyboard was working I pressed the caps lock button and the light was going on and off which tells me its powered. The only kind of input I have been able to acheive is by holding the mouse button down to eject the CD, other than that I have absolutly no control what so ever.
    Would like any insight.
    Cheers,
    Jarrod.

    HI,
    If you've had your iMac for less then one year then it's covered by the one year limited warranty.
    Take it to an Apple store or an Apple certified repair provider.
    Carolyn
    Message was edited by: Carolyn Samit

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