Security Update 2017-001 Sierra breaks my mini2012

[toke lahti]

Yep,
after installing and booting, just blank screen.
I'm using 10.12.6.
I have self made Fusion drive.

Could this be SIP thing?

 

[MacForScience]

Not likely.

Start here:
1.) Boot and hold option do you see your boot disk or not? If not skip to 4
2.) Can you boot to recovery partition? If not skip to 4
3.) Can you boot to single user mode? If not boot to verbose mode and pay attention to where it stops. Take a picture of it and post it.
4.) Boot to an external bootable drive and see if you can see your stuff?

• Check your disks SMART status (SMART Utility)
• Run in the terminal diskutil cs list and make sure it sees your drives

More likely than not you had a failed update. It is possible you have a bad drive, but given your problems after the update I would say bad update is the most likely.

Cheers!

 

[toke lahti]

Safe boot hangs also like normal boot with the bar under apple logo stops just at some point and nothing happens after that. Last night I left the mini on, and in the morning it had reached the login screen.
Is there any easy way to capture the boot texts from single user boot?

Verbose mode will continue to apple logo, so there's no text visible when the bar stops to continue...

 

[Fishrrman]

I know it's a little late now, but THIS is what having an external, fully-bootable backup drive is all about...

 

[toke lahti]

I know it's a little late now, but THIS is what having an external, fully-bootable backup drive is all about...

Doesn't solve this problem.
I've re-installed 10.12.6 3 times now. It doesn't matter if I boot from external or internal. After installing SU2017-001, the mac is stuck at boot. Meaning, if I don't make a clean install and manually move my own data, I can't install security updates anymore. I have a ticket in applecare, but they are slow and I've got some wrong advice so far.

I'd just like to know how to investigate what really hangs the booting...

EDIT: I did a clean install on external drive and SU went fine with it. But I don't have big enough spare drive to clone my whole internal FD or timemachineBU to it. Something in my internal FD's system hangs the mini at boot after SU and I would just like to know what...

 

[toke lahti]

I never found those verbose boot logs.
But in the picture might be the reason.
Now I have plain old hdd as the slower part of Fusion and update went fine and no beachballs yet.

Would be nice to know more about Fusion and how it defines which drive is faster and can user fix that. But since apple wants to get rid of fusion alltogether to sell their ssd with huge profits, I guess we’ll never know...