I get a popup when I try to open 1pw for mac v8. Says I have a newer version that must be updated fi

It sounds like you are running up against a database schema change from one of the latter beta or nightly versions. The best option would be to set aside the current installation database. Here's what you would need to do.

Change your settings to production channel to avoid any potential auto update. 1Password > Preferences > Advanced. If you can't do that at this time, please do so immediately after reinstalling 1Password.

1. Make sure you have your Emergency Kit and know your account password.
2. Quit 1Password and all browser for good measure. Right-click 1Password in the menu bar (If it's there) and click Quit.
3. Open Finder, and click the Go menu > Go to Folder... In the box that appears, copy and paste the following exactly:

~/Library/Group Containers/2BUA8C4S2C.com.1password/Library/Application Support/1Password/

1. Press Return.

2. You'll see a folder called Data – right-click on the folder and select Compress "Data".

3. Drag the original Data folder to the Trash.

4. Wait a few moments and then open 1Password 8. You'll be taken through the setup process.