So I gave my sister my mac, but my old messages are still on the messages app. She wants to see her old messages on the Mac now. So if she clicks “sync now”, will all my previous messages I sent on my Mac sync to her phone!?
iMac 21.5″ 4K, macOS 11.6
Did you take all the steps mentioned in this article before you gave your Mac to your sister?
Signing out of iMessage is one of them:
...
Sign out of iMessage
Open the Messages app, then choose Messages > Preferences from the menu bar. Click iMessage, then click Sign Out.
...
copied from: What to do before you sell, give away, or trade in your Mac - Apple Support
Did you take all the steps mentioned in this article before you gave your Mac to your sister?
Signing out of iMessage is one of them:
...
Sign out of iMessage
Open the Messages app, then choose Messages > Preferences from the menu bar. Click iMessage, then click Sign Out.
...
copied from: What to do before you sell, give away, or trade in your Mac - Apple Support
iMessage account on Mac
