I read through and tried a few of the things others tried but in the end I'm still too noob to this part to do anything with it. I still need my hand held on most of this. I can install and update regular releases no issue of course but when it comes to making software work that is not supposed to I have to follow a guide like the one here. I'm learning though and that's the main reason for following along.Maybe, something was wrong with Software Update, because i have multiple Sierra installations on multiple Macs (one unsupported MacBookPro and two supported iMac) but neither is showing beta2 in App Store. I'm not the only one: https://forums.developer.apple.com/thread/50917