I thought the hub was going to show betas. It doesn't for me. I did not see beta 12 show up in the list (either of the TWO you decided to release), and now beta 13 is out, which I wouldn't know about if I only relied on the hub.
Yeah, it seems new betas are slow to appear on the hub. I don't know if it's intentional. Probably not, since the b13 page encourages you to download Unity Hub to get it, but then the hub only shows beta12...? Between this and the patch releases not being supported, Unity Hub's usefulness is rapidly diminishing for me.
This is a known issue: Source: https://forum.unity.com/threads/unity-hub-could-show-the-latest-beta-releases.523251/
Beta 12 showed up the day before beta 13 was available, so I guess the delay is nearly a week. Although the two beta 12s may have different release dates.
Can I install as we used to do before and then move it manually to /Applications/Unity/Hub/Editor/2018.1.0b13 ??? Will it cause problem on a later update ?