I erased my HD and could not install lion. if I turn on the mac now all I see is a folder with a question-mark. How can I install a new operation system?

Install or Reinstall Mavericks, Lion/Mountain Lion from Scratch
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 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.
Erase the hard drive:
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your startup volume (usually Macintosh HD) from the
      left side list. Click on the Erase tab in the DU main window.
3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
        the Security button and set the Zero Data option to one-pass. Click on
      the Erase button and wait until the process has completed.
4. 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.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
            because it is three times faster than wireless.

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My MacBook Pro randomly froze during a sync to my iPhone and started making a scratching noise by the power button. I shut it off then turned it back on and it won't take me to the desk tops it will just flash a folder with a question mark in it. What do

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Welcome to the Apple Support Communities
It's possible that your hard drive has stopped working. Do you remember what OS X version you were using?
If your Mac came with DVDs, insert the Mac OS X Install Disc 1 and hold the C key while your Mac is starting to start from the DVD. Then, choose your language, and go to the Utilities menu (on the menu bar) > Disk Utility. After that, choose "Macintosh HD" in the sidebar and repair the drive. If it couldn't be repaired, you need a new hard drive, and you can do it yourself if you want. If you don't want, take the Mac to an Apple Store or reseller.
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Have a still folder with a question mark and OS on external HDD isn't loading onto the Mac Pro

Good Morning....... I'm having an issue with this Mac Pro I've recently purchased that came with an 500GB HDD and I added an 2TB HDD also, but it never had an OS on it and when you power on the Mac Pro, you'll get a still folder with a question mark on it. I am very determined to get this situation corrected!!! I had got a copy of Snow Leopard on a blank DVD from a friend of mine but nothing had changed or occurred when I put it in the optical drive & I even saved Maverick installation on an external HDD; it read the drive when I held down the option key during the startup chime, I choose the external because that’s the only volume it shown on the screen; nothing else!!! No sign of the copied disk, the two HDDs that's in the Mac Pro, just the external HDD with the OS on it; I choose the external with Maverick on it but it still doesn't read and then a still folder with the question mark appears..... Can someone please help & save me PLEASE?????????

Buy a retail copy of Snow Leopard, then we can "chat" and get you with a system installed.

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I got a flashing folder with a question mark. I got a new hard drive and upgraded to 4 gigs and can't open anything or reload the operating system? Help?

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Prep your new drive:
Drive Preparation
1. 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 Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, 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 (for Intel Macs) or APM (for PPC Macs,) 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.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
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When i boot i get a flashing folder with a question mark. disk utility doesnt work or read my harddrives to boot with. i installed a new SSD and its not reading that either. i have a macbook pro 2011, any help?

So I came to this problem a while ago. M ycomputer basically froze so I was forced to shut down by holding the button down. When I started it up I got the flashing folder with a question mark. I started it up holding down the command and r keys which brought me to disk utility. Although my computer doesn't read that I have a hard drive to start it up. When I click on the disk utility app, I cannot verify or repair anything either. The buttons won't allow me to click on them. It also shows "Mac OSX Base System" which shows I have files and what not saved. I had been told that I need a new hard drive so I bought and manually installed a OWC SSD 240GB drive and when i booted the computer up it booted up yo the operating system fine with all my files and what not on there. After about twenty minutes, it froze again. I forced a shut down, restarted and the same thing happened. I am not able to choose my SSD to boot up, although thats probably because it doesn't have an operating system installed on it??
i have a Macbook Pro 13" 2011
any help would be great, I'm overall confused.

ryansaint11,
this isn’t Apple support; this is a user-to-user forum. We’re just fellow users of Apple products here.
If you want to boot from your SSD, then you should put the SSD where your HDD currently is, and put the HDD into the optical bay. (That setup will also get you the best performance.) At the moment, you’re still booting from your HDD. Note that you will need to format your SSD in Disk Utility [with the “Mac OS X Extended (Journaled)” format] so that you can install OS X onto it.
Since you have an Early 2011 model, it might or might not have originally come with grey installation DVDs. You will be able to find out whether it did or not by trying to use OS X Internet Recovery to install OS X onto your SSD. If it does not work, or if the installed OS turns out to be Snow Leopard, then it will have originally come with the DVDs, and you should purchase a replacement pair of DVDs from Apple or iFixit; those discs will have your MacBook Pro’s Apple Hardware Test and its iLife apps. If the installed OS turns out to be Lion, then it will not originally have come with the grey installation DVDs, and your Apple Hardware Test will be installed along with Lion, and your iLife apps will be downloadable from the Mac App Store.

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Try starting up with your Snow Leopard DVD and see if the disk can be repaired. Once you are at the installer screen go to the Utilities Menu and choose Disk Utility and choose repair disk. You might also want to try Diskwarrior.
Hope this helps.
Ben

My laptop seemed to be frozen and I could not shut down from the menu. I held the power button for a long time and finally it shut off. When I started it again it turned on to show a black screen with an icon of a file folder with a question mark inside

Any idea what a blank screen with a flashing folder with a question mark inside of it means???

Ambinder55,
it means that the forced shutdown corrupted some portion of the internal disk’s filesystem. Which version of OS X is installed on your MacBook Pro?

My Macbook Air 2011 got a white screen and a folder with a question mark. I tried to press option+r and try to install the OS X Lion but it didn't show the disk Macintosh Hd

My Macbook Air 2011 got a white screen and a folder with a question mark. I tried to press option+r and try to install the OS X Lion but it didn't show the disk Macintosh Hd

You are using Snow Leopard so you have no OPTION+R shortcut. You need to boot the computer from your Snow Leopard DVD or USB flash drive.
Reinstall OS X 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.

My MacBook Pro turns on and only shows a folder with a question mark and blinks. The computer will not continue start-up. Suggestions/Advice?

I'm not sure how this screen is appearing, but I tried powering up my computer this morning and it immediately presents a grey screen, then displays a blinking folder with a question mark in the middle of it.
I am looking for troubleshooting advice and procedures to bypass this screen and allow my computer to complete it's start-up.
Thanks-
Gary D. Aston, Jr.
[email protected]

The folder with a question marks is usually an idication that the Mac can't find the system file to boot from.
Since you never told us which system your Mac was running there is nothing more to say.
Allan

Hey ppl,my macbook is not booting and by that i mean u can hear the audio wave when its starting up,the screen goes white and then after a while there's a folder with a question mark in the middle of the screen...anyone,any ideea?!?

Hey ppl,my macbook is not booting and by that i mean u can hear the audio wave when its starting up,the screen goes white and then after a while there's a folder with a question mark in the middle of the screen...anyone,any ideea?!?Regards.

That folder with the question mark icon means that the MacBook can't find the boot directory. That can either mean it can't find the hard drive or the hard drive data is somehow corrupted.
Put your install DVD into the drive and reboot. As soon as you hear the boot chime, hold down the "c" key on your keyboard (or the Option key until the Install Disk shows up). That will force your MacBook to boot from the optical drive.
Once it has finished booting and you are at the Install screen launch Disk Utility from the Utilities menu. Is your Hard Drive in the list on the left?
If it is then select the First Aid Tab run Repair Disk and if that repairs any problems run it again until the green OK appears and then run Repair Permissions.
If your hard drive isn’t recognized in Disk Utility then your hard drive is probably dead.

I erased my HD and could not install lion. if I turn on the mac now all I see is a folder with a question-mark. How can I install a new operation system?

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