I chrome extension that does screen recording build using vanilla javascript.

So, here are two major scenarios one in macOS and other ChromeOS/windows.

When I do tab recording in both the OS the recording works fines that mean it captures my mic with internal system audio - all good here!!

But, when I do Full Screen recording:

• ChromeOS/windows: captures all sound (my mic + internal sound) - again all good!!
• macOS: captures my mic only, not internal sound!!

While doing full-screen recording I saw a major difference in this famous popup:

Why there is a difference between the share system audio checkbox in mac it's not there and in ChromeOS/windows it's there?

pop-up in macOS:

pop-up in ChromeOS/windows: