The fourth developer beta of macOS Monterey 12.1 has arrived!

Apple today released the fourth beta of an upcoming macOS Monterey 12.1 update to developers for testing purposes, two weeks
 after the third beta. Registered developers can download the beta profile of macOS Monterey 12.1 through the Apple Developer Center. 
Once the appropriate profile is installed, the beta becomes available through the Software Update mechanism in System Preferences.

macOS Monterey 12.1 brings the SharePlay feature to Mac devices for the first time. SharePlay came as a new feature that allows
 you to watch TV, listen to music and play games with your friends and family over FaceTime.

macOS Monterey 12.1 fourth beta brings new features
SharePlay allows all kinds of applications to work with FaceTime. In addition, it ensures that the content is synchronized for all
 people who are part of the FaceTime call. You can listen to music and access shared playlists through Apple Music. Besides, you
 can watch synced TV shows and movies together.

Apple designed SharePlay to work with first-party apps such as Apple TV, Apple Fitness+ and Apple Music . But there is also an API
 option for developers. Thus, third-party applications can also use SharePlay, FaceTime features for games and other experiences.

SharePlay is currently available in the broadcast versions of iOS 15.1, iPadOS 15.1 and tvOS 15.1. Therefore, the Monterey 12.1 
update makes Mac devices compatible with other Apple devices. Monterey has become more stable with this update. Apple
 announced that the problems experienced in the previous version have been resolved.

macOS Monterey 12.1 fourth beta is available on which devices?
Apple announced the list of devices that support macOS Monterey 12.1 fourth beta version. The list is as follows:

iMac 2015 and higher
iMac Pro 2017 and higher
Macbook Air 2015 and above
Macbook Pro 2015 and above
Mac Pro 2013 and later models
Mac Mini 2014 and later models
Macbook 2016 and above