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Question: El Capitan won't Boot after update

I installed El Capitan and it was booting fine. Then I installed the latest update and after the restart, the Mac loads the Apple logo and then screen goes white and it just freezes there. I tried restarting holding shift to log into safe mode and it remains white. I've even held down command and R to get the recovery mode to load. I see are the boot options but when I select one, I just goes into a white screen.

iMac 24", Mac OS X (10.6.2)

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Oct 4, 2015 11:40 AM in response to Joe Winke In response to Joe Winke

I have the same problem - white screen, logo bar....Than Nothing.


iMac 21'' Mid 2011I have updated Yosemite to Capitan as usual via App Store.

4 years all was great...

Now, after update Mac downloade but all Appp worked very very slowly, so I have turnes off Mac and turn on it again. It freeze on white screen with logo and status bar.

Using CMD + R I have reinstalled OS X, all have repeated (((

Question marked as Helpful

Oct 6, 2015 7:23 AM in response to Joe Winke In response to Joe Winke

Hi, I had the same issue several times after installations of third party software too.

I resolved it booting into recovery and "touching" the system's extensions folder. This will make the Mac rebuild extensions cache.

What I did:

1) Power off the Mac

2) Press Option key and Startup

3) Keep Option Key pressed until the boot volumes show up on screen

4) Select the "Recovery 10.11" and press Return

5) From the "Utility" menu open "Terminal"

6) Touch Extensions. issue the following command. Replace Macintosh\ HD for the name of your system hard drive. Spaces are written as "\ "


touch /Volumes/Macintosh\ HD/System/Library/Extensions


7) Quit Terminal; Quit Mac Utilities

8) Re-select your system hard drive on the "Choose Startup Disk" dialogue.

9) Restart


Note: the touch utility just updates the modification date of the file/folder. It does not change any content, therefore, this method should be safe.

Nevertheless, don't blame me for lost data or something bad.


Cheers,

Carlos

Question marked as Helpful

Oct 5, 2015 11:19 PM in response to Joe Winke In response to Joe Winke

hey there, I thought I was the only one with this issue. I have a mid 2010 21.5-inch iMac with 12GB RAM. After updating to OS X El Capitan from Yosemite, it was working fine, but as always, I'll shut down the computer before I go to sleep. The next day, when I pressed the power button, all that showed was the white screen with the Apple logo, and the progress bar which wasn't progressing at all! 😮


I thought it was a hard drive issue, but after running Apple hardware test, no malfunctions were found. I had to reinstall the OS again after booting up while pressing CMD+R. Does this affect all Macs after updating to El Capitan, or just a few? Right now, I dare not shut down my computer again, instead I just put it to sleep before I go to sleep. I can't risk losing all my precious pictures and school work. Any fix for this issue currently? 😟

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Oct 6, 2015 2:48 PM in response to Joe Winke In response to Joe Winke

Its work!:


Posted by TSOPA from Reboot fail after installing El Capitan help!!


Hey I ran across this fix and it worked for me on two machines.


Email this code to yourself, but change the machine name to YOUR EXACT(!) HardDisk-name.


  • cd "/Volumes/Macintosh HD/Library/Extensions/" ; mkdir Unsupported ; mv Net* Unsupported ; mv Sym* Unsupported ; mv hp* Unsupported ; mv ndc* Unsupported ; cd "/Volumes/Macintosh HD/System/Library/Extensions/" ; mkdir Unsupported ; mv Belc* Unsupported ; mv Eltima* Unsupported ; mv hp* Unsupported ; mv Hua* Unsupported ; mv Netg* Unsupported ; mv Remo* Unsupported ; mv RIM* Unsupported ; mv USBEx* Unsupported ; rm -Rf /Volumes/Macintosh HD/Library/Filesystems/*fuse* ; rm -Rf /Volumes/Macintosh\ HD/Library/Application\ Support/Sym* ; rm -Rf /Volumes/Macintosh\ HD/var/folders/*

Boot in Restore mode.

Click OS help and Safari will open

Open your email and copy the code

Quit Safari and open Terminal from the top menu

Paste the code and hit return.

Give it a minute or two. When it is done you will then be able to quit Terminal.


Restart. Be patient, restart does not begin immediately, and in 20-30 seconds

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Oct 5, 2015 1:31 PM in response to Joe Winke In response to Joe Winke

I have the same problem on my Imac 21'' mid 2011.


I've upgrade from Yosemite to El Capitan on Apple Store and hang up on startup with apple logo and the progress bar (waited for at leat 3 hours) When finally able to enter recovery mode and reinstall OSX el Capitan, the Imac Hangs on the same part. Nothing is plug on USB, Ehternet or any other slot.


4 years with no problems with my Imac, upgrade from from Yosemite to "El Capitan" and all this happened....thanks Aplee....someone could fix it?

Question marked as Helpful

Oct 8, 2015 10:45 AM in response to fjullian In response to fjullian

The possible solution that I previously posted doesn't require you to modify the volume name. Don't change anything. Just replace Macintosh\ HD by your system volume name in the touch command.

For example, my system drive name is "Lua". The command to input in Terminal would be:


touch /Volumes/Lua/System/Library/Extensions


The solution by RusFox tries to move supposedly incompatible third party extensions to another folder to be ignored by MacOS. You may or may not have these extensions installed. Same goes for the removal of the Eltima extension.


I believe that there is something wrong with the new system Installer and assume it is not rebuilding the extensions cache correctly.

In order to speed-up the startup process the Mac builds an Extensions cache file based on installed kext files. If you add or remove Extensions (.kext files) the cache needs to be rebuilt. The system should identify incoherent cache and rebuild it on startup.


Therefore, I changed the modification date of the Extensions folder with the touch utility. This is an indication for the MacOS that the cache may not match the actual contents Extensions folder and force a cache rebuild.

This worked for me, and a few more users 🙂

Question marked as Helpful

Oct 6, 2015 7:12 AM in response to Joe Winke In response to Joe Winke

LInc Davis' step #8 worked for me:

Step 8

Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.

Once I removed my peripherals from the USB ports, the screen right up (from the gray screen), and the installation finished. Plugged peripherals back in after install completed, and everything seems to be working fine.

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Question marked as Helpful

Oct 4, 2015 11:40 AM in response to Joe Winke In response to Joe Winke

I have the same problem - white screen, logo bar....Than Nothing.


iMac 21'' Mid 2011I have updated Yosemite to Capitan as usual via App Store.

4 years all was great...

Now, after update Mac downloade but all Appp worked very very slowly, so I have turnes off Mac and turn on it again. It freeze on white screen with logo and status bar.

Using CMD + R I have reinstalled OS X, all have repeated (((

Oct 4, 2015 11:40 AM

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Question marked as Solved

Oct 12, 2015 6:46 PM in response to Joe Winke In response to Joe Winke

Take each of these steps that you haven't already tried. Some of them may not be applicable to your model or your situation. Stop when the problem is resolved.

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.

Step 1

The first step in dealing with a startup failure is to secure the data. 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. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.

There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.

a. 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 don't need a DVD if you're running OS X 10.7 or later.

b. 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. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.

c. 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. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.

d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

Step 2

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.

Start up 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. Ask for further instructions.

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.

The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.

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. In that case, go to Step 9. If you ever have another problem with the drive, replace it immediately.

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 don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)

If the startup process hangs again, the problem is likely caused by third-party software that you installed. Ask for further instructions.

Step 3

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. 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.

Step 4

If Step 3 fails, the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.

Step 5

If a desktop Mac (without a built-in keyboard) hangs at a plain gray screen with a movable cursor, the keyboard may not be recognized. Press and hold the button on the side of an Apple wireless keyboard to make it discoverable. If need be, replace or recharge the batteries. If you're using a USB keyboard connected to a hub, connect it to a built-in port.

Step 6

Sometimes a startup failure can be resolved by resetting the NVRAM.

Step 7

If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.

Step 8

Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.

Step 9

Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.

This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.

Step 10

If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.

Step 11

Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.

Step 12

Do as in Step 11, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.

Step 13

This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's, MacBooks with a removable main battery, and some others (not current models.) A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.

Step 14

If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

Oct 12, 2015 6:46 PM

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Oct 4, 2015 2:53 PM in response to Linc Davis In response to Linc Davis

Good job...lots of information but....I've only been using the Mac for thirty years...you've heard of the Classic, Mac for Schools, so this is so far over my head!

I Can understand why so many people only use their Macs for e-mail!

Oct 4, 2015 2:53 PM

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Question marked as Helpful

Oct 5, 2015 1:31 PM in response to Joe Winke In response to Joe Winke

I have the same problem on my Imac 21'' mid 2011.


I've upgrade from Yosemite to El Capitan on Apple Store and hang up on startup with apple logo and the progress bar (waited for at leat 3 hours) When finally able to enter recovery mode and reinstall OSX el Capitan, the Imac Hangs on the same part. Nothing is plug on USB, Ehternet or any other slot.


4 years with no problems with my Imac, upgrade from from Yosemite to "El Capitan" and all this happened....thanks Aplee....someone could fix it?

Oct 5, 2015 1:31 PM

Reply Helpful (14)

Oct 5, 2015 3:18 PM in response to Joe Winke In response to Joe Winke

Used the suggestion to restart using the Command-R keys and selected reinstall. It worked.

When all that passed and I was going again I noticed that I was back with Yosemite...10.10.5 for my OS

I guess I should be so lucky...

I'll wait a few months so Apple can get this new one right...I'm not an engineer!

Oct 5, 2015 3:18 PM

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Question marked as Helpful

Oct 5, 2015 11:19 PM in response to Joe Winke In response to Joe Winke

hey there, I thought I was the only one with this issue. I have a mid 2010 21.5-inch iMac with 12GB RAM. After updating to OS X El Capitan from Yosemite, it was working fine, but as always, I'll shut down the computer before I go to sleep. The next day, when I pressed the power button, all that showed was the white screen with the Apple logo, and the progress bar which wasn't progressing at all! 😮


I thought it was a hard drive issue, but after running Apple hardware test, no malfunctions were found. I had to reinstall the OS again after booting up while pressing CMD+R. Does this affect all Macs after updating to El Capitan, or just a few? Right now, I dare not shut down my computer again, instead I just put it to sleep before I go to sleep. I can't risk losing all my precious pictures and school work. Any fix for this issue currently? 😟

Oct 5, 2015 11:19 PM

Reply Helpful (17)

Oct 6, 2015 4:23 AM in response to Joe Winke In response to Joe Winke

Hi. I have the same issue.


After installing El Capitan in 3 iMac's, one hangs up after the apple logo and after appearing the status bar.


The mac installs the system well and boots well after installation. If I restart or shut down and reboot, the problem persists. I reinstalled it 3 times. I wont shut it down until I have to.


Already tried the NVRAM and disc tools. No success 😟


iMac (27-inch, Late 2013) - Working fine

iMac (20-inch, Early 2009) - Working Fine

iMac (21.5-inch, Mid 2011) - Having Problems on the startup


please help.

Oct 6, 2015 4:23 AM

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Question marked as Helpful

Oct 6, 2015 7:12 AM in response to Joe Winke In response to Joe Winke

LInc Davis' step #8 worked for me:

Step 8

Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.

Once I removed my peripherals from the USB ports, the screen right up (from the gray screen), and the installation finished. Plugged peripherals back in after install completed, and everything seems to be working fine.

Oct 6, 2015 7:12 AM

Reply Helpful (5)
Question marked as Helpful

Oct 6, 2015 7:23 AM in response to Joe Winke In response to Joe Winke

Hi, I had the same issue several times after installations of third party software too.

I resolved it booting into recovery and "touching" the system's extensions folder. This will make the Mac rebuild extensions cache.

What I did:

1) Power off the Mac

2) Press Option key and Startup

3) Keep Option Key pressed until the boot volumes show up on screen

4) Select the "Recovery 10.11" and press Return

5) From the "Utility" menu open "Terminal"

6) Touch Extensions. issue the following command. Replace Macintosh\ HD for the name of your system hard drive. Spaces are written as "\ "


touch /Volumes/Macintosh\ HD/System/Library/Extensions


7) Quit Terminal; Quit Mac Utilities

8) Re-select your system hard drive on the "Choose Startup Disk" dialogue.

9) Restart


Note: the touch utility just updates the modification date of the file/folder. It does not change any content, therefore, this method should be safe.

Nevertheless, don't blame me for lost data or something bad.


Cheers,

Carlos

Oct 6, 2015 7:23 AM

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Question: El Capitan won't Boot after update