Boy, two extra modifier keys: [Wayback/Archive] How to Strip Formatting When You Copy and Paste Text: 5 Ways
To paste as plain text on a Mac, you can use the somewhat cumbersome shortcut
Option+Cmd+Shift+Vto paste without formatting. This is a system-wide shortcut, so unlike Windows, it should work everywhere. Technically, the shortcuts pastes and matches the formatting, but this has the same effect of removing the original formatting.
Via [Wayback/Archive] macos word microsoft office paste without formatting – Google Search.
Paste without formatting is an issue on Windows as well. The default should be “paste without formatting” instead of the current “paste with source formatting”. See for instance these tweets:
The Wiert Corner - irregular stream of stuff 