Cant install UnitySetup-iOS-Support-for-Editor-5.5.1f1 on 10.12.4 (beta 16E192b)

Trying to install the Unity iOS support.
I can’t seem to get it to do “sensible”. Can anyone more experienced help?

I’ve included a vid of what I’ve tried, hopefully with some useful info.
OSX 10.12 (beta4, recently updated).
Unity 5.5.1f1

It appears to be signing/pk related. Not sure.
Any tips?

did you leave unity application running during the install ?
don’t do that - if you chose default install location the installer started overwriting existing files / of running application / - i’m not sure that can be good

Hmm, good point. I tried again, this time making sure. I don’t think I had Unity open first time around, and I definitely didn’t second time. Same error.

how come the installer didnt want you to choose components to dl / install and instead started downloading ios support immediately ?
did you cut the video , or have you previously downloaded the rest of the the installation ?
if you install to default location try to delete the unity.app first and try to download and install everything from the installer in one go

I only just found that the iOS parts were available in the installer itself. Didn’t need iOS when I started my original install, and forgot it was there (as part of original installer).

Went and installed 5.5.2f1, and included iOS as well this time, worked just fine! yay.