Security Update 2017-001 10.11.6 Crashes

Alex, you are not the only one! I am on a MacBook Pro, El Capitan 10.11.6, and this security update killed my machine as it did to yours. Fortunately I had a Time Machine backup, but I had to recover the whole computer from it - very tme consuming. Security Update 2017-001 10.11.6 Crashes at least some user machines!

Hi, I don't see any download link on that page. I'm on a 2007 iMac, 10.11.6, I can't install the 2018 security update, tried everything, two fresh installs of the OS. Any help would be greatly appreciated!

Ditto for me - two Macs, one old one running OSX El Capitan and a new one running High Sierra, the patches loaded automatically overnight a couple of weeks back next morning both were KPing, I reloaded the OSX on each and did the updates one at a time but haven't put the Security one in again I was waiting to see if Apple came out with another one that would fix the issue.....oh I did initially remove all the apps that were booting and that made no difference still the KPing (and a lot of wasted time)

Top right of the page, Contact Support.

Many people have installed the update, it is more likely to be a problem with your Macs.

Why don't you try my method.

Glad it helped sgwynne50. I later realised that my machine is so much more responsive now too! 😀

I suppose Apple did me a favour really 😉

Hello

I also had this problem when attempting the security update via the App Store on my mid 2010 Macbook Pro. It sent my machine into a kernel panic loop and the only way out of it was to reinstall the OS (El Capitan). I've done that 3 times now - lots of time to get the vacuum cleaner out and do some housework so no time wasted at all. Hah! However, each time I tried to bring the machine back up-to-date, the updates sent everything back to the kernel panic loop. I joined this forum to try to find the answer; this post and another one that I can't now find, helped me out enormously.

I'd like to send a big, big thank you to BobHarris and EauRouge for your answers to alexd0001's question and for getting me thinking about what might have been causing the problem. Your comments on this and the other post got me to the answer I needed.

It turns out that the security software my bank urges its users to use, was fighting against the security update that Apple was trying to upload - you couldn't make this up, eh? I removed the bank's software (which I've been told I shouldn't really need seeing as it's on a Mac but please feel free to correct me if that's wrong!) and Hey Presto! It's all working properly, I've not had to upgrade to High Sierra (which is great as El Cap suits my machine and my requirements perfectly) and I've been able to install the Apple security update without causing another kernel panic loop.

I'm really grateful for the help I've received here. Thank you.