Security Update 2016-001 10.11.6 - Black Screen with Cursor

All: I tried all of the solutions in this thread and many others. I finally decided to call Apple Care...(even though my iMac is out of warranty). I was on the phone for maybe 10 minutes and my problem was resolved.

Apple is investigating the issue and its causes and said that they will assist ANYONE who calls in with this issue (whether your Mac is in warranty or not).

They had me go into single user mode and after a couple short commands I was back in business. (Sorry, I do not remember the commands)

The gentlemen I spoke to was a senior advisor (Shane Boyle) and he even asked that I reply to a couple of the threads informing people that they can call for assistance even if your mac is out of warranty. He was very pleasant to talk to and very knowledgeable. Thanks Shane!

Same problem with iMac 5K, no problems with MacBook 2016 though. Very glitchy update indeed.

Have exactly same issue with my Macbook Pro (2011). I have to reinstall OS from cmd+r. Then I made the security update again and get the same issue : black screen, or white screen at startup. Now, i'm doing a TM restauration of 31 august restaure point.

Can apple fix really quickly this "security" update ?

Same issue here. Installed the update twice and got black screen each time. Only recovery mode possible. - iMac 5k late 2015. Very disappointing, Apple.

After getting your computer working per some of the above suggestions, try downloading the update from the link below. This worked for me after the App Store download failed.

Security Update 2016-001

I had this same problem.

It seems that for some reason, the update reset my preferences to require me to sign in with a password when I logged in, and then instead of switching from the Apple startup screen to the login screen, it went black (but apparently, still wanted me to sign in.)

I was able to start up in safe boot (hold the shift key after the startup chime), and then go into the System Preferences>Security & Privacy>General and unclick Require Password and Disable Automatic Login.

Then I restarted as usual, and while the screen went black briefly, it continued with the startup as normal. I don't know what happens if you recheck those options to require the password at login, but since then mine has been starting up normally. So far.

This did not work for me on m MacBook pro 2014

Same problem with iMac (27-inch, Late 2009)

I have a similar issue. After installing the update, the reboot did not go beyond a white screen. Eventually, the spinning ball started. I let it go for 10 hours, and eventually forced a reboot. It never went beyond the white screen even in safe mode. I restored from time machine (40 hr recovery time). My drive was nearly full (less than 100G of a 1TB drive available) so I removed about 200G, checked the hard disk using Disk Warrior (no errors), thought I would try again. Once again the problem happened. And again it took nearly 40 hrs to recover from time machine. MacBook Pro 15" Late 2013 model.

Same happened to me but I just reinstalled OsX. All my "stuff" was still there. Much quicker than a time machine restore.

I had this problem on two iMac 27" incl. one fresh out of the box 2 days ago. Installed Security Update 2016-001, computer restarted - Apple logo appears, progress bar appears gets about halfway through and screen goes black. Any attempts to remedy locally were futile. Things I tried that DID NOT WORK:

1. Reset PRAM
2. Reset NVRAM
3. Restart
4. Reinstall Mac OS X 10.11 from Recovery Disk

I was able to remote in to the machine via ssh/terminal so I could tell the machine appeared to be up and running, just no video. After some log diving I i finally located a crashing process that just kept repeating over and over. First I noticed "Report Crash" using ps -ax was spiking every few seconds. I then investigated /var/log/system.log (still working remotely) and noticed a 4 line error entry repeating over and over and over. Something to do with launch services (led):

com.apple.xpc.launchd[1] (com.apple.lsd[233]): Service exited due to signal: Segmentation fault: 11

After many hours of trial and error rooting around remotely using the terminal - I finally found a solution. Something in the /private/var/folders directory was causing the hang. I attempted to remove everything under /private/var/folders (using sudo rm -rf /private/var/folders/*) which yielded a few errors - files/dir that could not be deleted - but almost immediately the screen came to life and all has been well ever since.

Not sure what the problem is exactly - and the procedure above is not for novice users. Please if you are not familiar with using the terminal and especially root access - do not do anything shown in this thread. It is my hope that this thread is useful for Apple Techs to track down the problem.

09-08-16 - filed bug report with Apple -

28206235 - Black Screen After Installing Security Update 2016-001

So I have faced the same problem and found the following to fix it.

In the terminal run the following commands to ensure that the update gets downloaded and installed.

$ sudo su
$ softwareupdate -i -a; shutdown -r now

It may not look like it is doing any thing but it is in the back ground. After my machine restarted I checked if the update was installed by opening the App Store.

Whilst my machine at this point recognized that the update was installed it once again, hung on shutdown. I run the Onyx App and had it run all the maintenance scripts. Onxy asked to restart my machine which I did and now everything is working.

Same problem here. iMac 5K.

i made the third try and update went ok. Very strange.