my messages app does not look like this?
Why has my messages app not updated to the new look?
iMac 27″, macOS 11.4
Why has my messages app not updated to the new look?
iMac 27″, macOS 11.4
If you mean the bubble icon look on the left side, you need to Pin some conversation for that to happen.
Right click or command click on a conversation and select Pin conversation.
Once you have enough conversations pinned it will look like that.
my messages app does not look like this?