I have been trying to help my classmates at Flatiron install Solargraph for their Macbooks but the problem I have been encountering is with IntelliSense / pop up. It seems to provide the method names, and hoover seems to sometimes work, but the definition/snippet pop up does not appear to the right of it like it's supposed to.
We're using VSCode, I did put a check on use language server and I have tried to uninstall and reinstall the extension.
It sounds like the popup with additional info is closed. When you hover over the completion item, a > should appear on the right side of the bar. Clicking it should open the popup. It'll stay open for other items until you close it again.