Any one know how to remove this shared chrome instance? This keeps popping up and showing current tabs from a colleague's computer. Any way to disable this? It may be because we're using a global apple ID but unsure.
Thanks in advance.
This is part of the handoff functionality. Which is indeed linked to an AppleID. You can easily disable handoff in System Preferences.

System Preferences --&gt; General 


And then uncheck “Allow Handoff Between This Mac and Your iCloud Devices”.



More info on handoff at the Apple's website Pick up where you left off with Handoff on Mac.