- #MACBOOK PRO A1278 2011 SCREEN PROTECTOR INSTALL#
- #MACBOOK PRO A1278 2011 SCREEN PROTECTOR SOFTWARE#
- #MACBOOK PRO A1278 2011 SCREEN PROTECTOR PASSWORD#
- #MACBOOK PRO A1278 2011 SCREEN PROTECTOR MAC#
If you had previously seen warnings of low disk space, this is almost certainly the case. If Step 3 fails, the startup volume may be full.
#MACBOOK PRO A1278 2011 SCREEN PROTECTOR PASSWORD#
You might be able to log in by using the arrow keys or the cursor to select the password field and typing your password as usual. If the startup process stops at a plain gray screen with a movable cursor, then the login dialog may be active but not visible because of a bug.
#MACBOOK PRO A1278 2011 SCREEN PROTECTOR SOFTWARE#
If the startup process hangs again, the problem is likely caused by third-party software that you installed. Then restart as usual (i.e., not in safe mode.)
Do this until the available space is more than 9 GB. Deletion isn't complete until you empty the Trash again. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you ever have another problem with the drive, replace it immediately.
If the startup progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. If you’ve forgotten the password, you will need to reset it before you begin. You must know the login password in order to log in. The login screen appears even if you usually log in automatically. Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs. If you don't see the words "Safe Boot" in the startup screen, you haven't started in safe mode. Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. If you've started from an external drive, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
#MACBOOK PRO A1278 2011 SCREEN PROTECTOR MAC#
If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.ĭ. Use the working Mac to copy the data to another drive. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. You'll use the Recovery installer, rather than downloading it from the App Store.Ĭ.
#MACBOOK PRO A1278 2011 SCREEN PROTECTOR INSTALL#
Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. If you already have an external drive with OS X installed, start up from it. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. You don't need a DVD if you're running OS X 10.7 or later.ī. Start up from the Recovery partition, or from a local Time Machine backup volume ( option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You need an external hard drive to hold the backup data.Ī. There are several ways to back up a Mac that is unable to start. If you don't care about the data that has changed since the last backup, you can skip this step. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. The first step in dealing with a startup failure is to secure the data. To restart an unresponsive computer, press and hold the power button for a few seconds until the power shuts off, then release, wait a few more seconds, and press it again briefly.
Some of them may not be applicable to your model or your situation. Please take each of these steps that you haven't already tried.
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