Davinci 15 Public won't launch

Hello all, I downloaded Davinci 15 public beta on my Mac Pro (2010 running High Sierra up to date; 18gb ram; two Radeon 5770 graphic cards). However after installing, the app won't boot. Before I downloaded it, I uninstalled the previous version I had (Davinci 13). I have tried the update 15.b4 that was released earlier today but unfortunately it has the same results. Would anyone be able to offer a suggestion that could get Davinci 15 to boot? Many thanks

I think you need Sierra as a minimum.

[Dwaine Maggart]

There was no Resolve 13.

We need logs to try and help you.

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