Is Monterey 12.1 update the last update for mid 2015 MacBook Pro? Because after updating to Monterey 12.1 I received:
Legacy System Software: Existing software on your system loaded a system extension signed by "Oracle America, Inc." which will be incompatible with a future version of macOS. Contact the developer for support.
Legacy System Software: Existing software on your system loaded a system extension signed by "Oracle America, Inc." which will be incompatible with a future version of macOS. Contact the developer for support.