If you don't care about speed, then the suggestion to "drag the 🔒 lock symbol from the left of the address bar onto a different (profile’s) window’s tab bar or address bar" is a good one.
If you're looking for a way to do this using the keyboard on a Mac, you can use an Applescript that is activated using a hotkey (e.g. BetterTouchTool).
-- copy current URL to clipboard
tell application "Google Chrome"
set the clipboard to URL of active tab of front window as text
end tell
-- delays necessary, especially when switching windows
delay 0.1
tell application "System Events"
-- make sure commands are being told to "Google Chrome"
tell (name of first application process whose frontmost is true)
-- switch to other profile (assuming only 2)
keystroke "m" using {command down, shift down}
delay 0.1
keystroke return
delay 0.2
-- open a new tab
keystroke "t" using {command down}
delay 0.2
-- paste the URL from the clipboard
keystroke "v" using {command down}
delay 0.1
keystroke return
end tell
end tell
Connect this Applescript to a keyboard command, and then use it whenever you want to copy the current page to another profile. Note: I'm assuming you only have 2 profiles. If you have more, then additional logic will be required to select the correct profile after pressing Command+Shift+M
.