This is really the worst version of El Capitan ever, counting from Developer Beta 1. Until 10.11.5 Beta 4 everything was okay. I did not use my Late 2011 MBP that much at the moment. But the crashing apps that never crashed before are the same as on my Late 2015 iMac 5K.
Now I have even graphic problems on my iMac. Sometime a small window for example the 1Password update window gets suddenly totally messed up with a lot of different colors that I can't see anything of the content anymore, while the window next to it is totally normal. I think it also happened with Preview and something other I can't remember.
When I move such a window it gets normal for a short while and then messes up again. On a screenshot it looks totally normal. I have to move it around for a while until I see the content again or just close it. It happened four times today with maybe three different apps but they don't crash.
Opera was always open and looked totally normal but it still always crashes on both Macs when I click on "Add to Bookmarks" in the menu and than on the button for the bookmark location "Unsorted Bookmarks" says it here in the screenshot and I can't change it because it just closes the browser and OS X does not even recognize the crash to send a report:

As I wanted to send my first iMessage from the iMac today I got immediately a "Not Delivered", but was logged in saw my phone numbers and email addresses and everything looked fine. Sending with Telegram was no problem. And iMessage from the iPhone to the same person did also work.
But then I saw in the iMessage settings of my phone that I was logged out with my Apple ID. It was only activated with my phone number.
Yesterday I already got about 10 time the message that the FaceTime activation could cause carrier fees. I did not even use FaceTime and never activated it on my phone. But always after such a message or even without any, iMessage is messed up in some way. Today the logout, yesterday the "start new conversation" email address always changed back to one of my two phone numbers on my 6s Plus. Now I see that the second one from the 4s is gone on the Mac but on the 4s everything is there on the 6s Plus the 4s number is also missing.
So, the same for iOS 9.3.2 no real problem from developer beta 1 of iOS 9.0 until the update from 9.3.2 Beta 4 to the final version.
Then i just noticed. The first screenshot I made for the post here did not appear on the desktop, the second try after about ten seconds on a Late 2015 4 GHz i7 iMac with a blazing fast SSD and 32 GB of RAM. Normally even a 5K shot from the full screen would appear instantly.
I already did an SMC and NVRAM reset, the hardware test with holding D while booting up, but it did not change or found anything and when two iPhones and a much older MacBook are also affected with many problems, than it can't be hardware related. I did not see that graphics issue on the MBP yet but yesterday I mostly used it with Snow Leopard and today only for a short while at all. But the screen sometime is slightly flickering, same on the iMac.
Then there is another problem too with my Logitech wireless mouse connected to a USB receiver in the iMac. The connection is disturbed in some way (the cursr sometimes moves too slow or with many interruptions) but the maximum distance from mouse to iMac is 20cm and the batteries are new. Even as they got completely empty a few days before the update I had not a single problem.
And I never had WiFi problems with many routers since 2013. I had very much with my first MacBook (Air Mid-2013) and my first iPhone (5) on Mountain Lion and iOS 6. But they disappeared with Mavericks and iOS 7 and never came back until this update. This time it's totally different and not that bad, nut did not exist until both iOS 9.3.2 and OS X 10.11.5 were updated from beta 4 to final.
I think there were even more issues but I forgot them and if booting the USB installer of Elementary OS had worked last night on the iMac I might already be on Linux. I think I should try it with a more common one like Ubuntu or Mint first.
Edit: I remember another bug. I wondered wha my master password for 1Password diid not work anymore and later recognized that the keyboard layout has changed from Austrian to US. The US layout was not even installed before it happened today and the other one was gone.
By the way: Why does OS X even have an Austrian Keyboard layout? There is not a single difference between keyboards in Germany and Austria.
Now I have even graphic problems on my iMac. Sometime a small window for example the 1Password update window gets suddenly totally messed up with a lot of different colors that I can't see anything of the content anymore, while the window next to it is totally normal. I think it also happened with Preview and something other I can't remember.
When I move such a window it gets normal for a short while and then messes up again. On a screenshot it looks totally normal. I have to move it around for a while until I see the content again or just close it. It happened four times today with maybe three different apps but they don't crash.
Opera was always open and looked totally normal but it still always crashes on both Macs when I click on "Add to Bookmarks" in the menu and than on the button for the bookmark location "Unsorted Bookmarks" says it here in the screenshot and I can't change it because it just closes the browser and OS X does not even recognize the crash to send a report:

As I wanted to send my first iMessage from the iMac today I got immediately a "Not Delivered", but was logged in saw my phone numbers and email addresses and everything looked fine. Sending with Telegram was no problem. And iMessage from the iPhone to the same person did also work.
But then I saw in the iMessage settings of my phone that I was logged out with my Apple ID. It was only activated with my phone number.
Yesterday I already got about 10 time the message that the FaceTime activation could cause carrier fees. I did not even use FaceTime and never activated it on my phone. But always after such a message or even without any, iMessage is messed up in some way. Today the logout, yesterday the "start new conversation" email address always changed back to one of my two phone numbers on my 6s Plus. Now I see that the second one from the 4s is gone on the Mac but on the 4s everything is there on the 6s Plus the 4s number is also missing.
So, the same for iOS 9.3.2 no real problem from developer beta 1 of iOS 9.0 until the update from 9.3.2 Beta 4 to the final version.
Then i just noticed. The first screenshot I made for the post here did not appear on the desktop, the second try after about ten seconds on a Late 2015 4 GHz i7 iMac with a blazing fast SSD and 32 GB of RAM. Normally even a 5K shot from the full screen would appear instantly.
I already did an SMC and NVRAM reset, the hardware test with holding D while booting up, but it did not change or found anything and when two iPhones and a much older MacBook are also affected with many problems, than it can't be hardware related. I did not see that graphics issue on the MBP yet but yesterday I mostly used it with Snow Leopard and today only for a short while at all. But the screen sometime is slightly flickering, same on the iMac.
Then there is another problem too with my Logitech wireless mouse connected to a USB receiver in the iMac. The connection is disturbed in some way (the cursr sometimes moves too slow or with many interruptions) but the maximum distance from mouse to iMac is 20cm and the batteries are new. Even as they got completely empty a few days before the update I had not a single problem.
And I never had WiFi problems with many routers since 2013. I had very much with my first MacBook (Air Mid-2013) and my first iPhone (5) on Mountain Lion and iOS 6. But they disappeared with Mavericks and iOS 7 and never came back until this update. This time it's totally different and not that bad, nut did not exist until both iOS 9.3.2 and OS X 10.11.5 were updated from beta 4 to final.
I think there were even more issues but I forgot them and if booting the USB installer of Elementary OS had worked last night on the iMac I might already be on Linux. I think I should try it with a more common one like Ubuntu or Mint first.
Edit: I remember another bug. I wondered wha my master password for 1Password diid not work anymore and later recognized that the keyboard layout has changed from Austrian to US. The US layout was not even installed before it happened today and the other one was gone.
By the way: Why does OS X even have an Austrian Keyboard layout? There is not a single difference between keyboards in Germany and Austria.
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