Why Apple? Are you kidding me?
It still worked in 10.12.5. 
I hope this is just a bug. The left button with further informations does nothing else as the OK button.
If this is on purpose, this Mac is going back tomorrow... What I wanted to do anyway because of the WWDC rumors, but now I won't buy the new version anymore.
I know it might work on my 2011 MBP but this one is much faster in what I wanted to do with those installers.
Backing it up everywhere it's possible, like here:
I hope this is just a bug. The left button with further informations does nothing else as the OK button.
If this is on purpose, this Mac is going back tomorrow... What I wanted to do anyway because of the WWDC rumors, but now I won't buy the new version anymore.
I know it might work on my 2011 MBP but this one is much faster in what I wanted to do with those installers.
Backing it up everywhere it's possible, like here: