And shameless plug for my own cross-platform powershell-based 1Password client, which can read both formats of local vaults: https://github.com/latkin/1poshword
I tried the v4, but it wouldn't accept my v6 license key :(
My workaround was to write a small utility that I run on both my Mac and Windows boxes that sits in the background and keeps the two clipboards synchronized. So I just copy from Mac 1p and paste in Windows. Not ideal, since it makes the browser extension useless, but it works well enough for the few times that I need to enter passwords on that box. But on the plus side, I can also use it for entering commands in cmd.exe and Powershell too.
My workaround was to write a small utility that I run on both my Mac and Windows boxes that sits in the background and keeps the two clipboards synchronized. So I just copy from Mac 1p and paste in Windows. Not ideal, since it makes the browser extension useless, but it works well enough for the few times that I need to enter passwords on that box. But on the plus side, I can also use it for entering commands in cmd.exe and Powershell too.