Move set of open Safari windows/tabs to another Mac

I have a bunch of windows & tabs open in Safari. I want to view all the same windows and tabs on another Mac.

☞ Is there a set of URLs or bookmarks somewhere used by Safari to remember open windows/tabs between sessions? Might I be able to grab a copy of those URLs or bookmarks to put on a thumb drive?

I know Macs and iPads can hand off the top currently viewed Safari window between each other. But I want to move all of a few dozen open windows & tabs.

Solution 1:

☞ Is there a set of URLs or bookmarks somewhere used by Safari to remember open windows/tabs between sessions?

In macOS Catalina the ~/Library/Safari/LastSession.plist file contains a list of all open windows and their tabs.

Note that while it's called LastSession.plist, nonetheless, it does contain the current windows and their tabs.

You can try copying this file to the same location on the other Mac and see if it gives you what you want. In case it's not obvious, Safari needs to be closed when replacing this file.

I tested copying the LastSession.plist file from macOS Catalina to macOS Big Sur and it worked by opening Safari and selecting Reopen All Windows from Last Session from the History menu.

_{I'm currently using Safari version 14.0.3 (15610.4.3.1.6, 15610) on macOS Catalina and Safari version 14.1.1 (16611.2.7.1.4) on macOS Big Sur.}

Solution 2:

Tab groups in Safari 15 synchronise over iCloud. You can switch to a tab group from another Mac and all your tabs will be opened. Opening or closing a tab in a tab group on one Mac will perform the same action on another Mac.

You can make a new tab group from all your current tabs from the tab group menu, which you can then open on another Mac to transfer/synchronise your current tabs.