More than a year after Twitter pulled the plug on its official app for the Mac, it looks like the company will be launching a new version for Apple PCs later this year. The application is being created as part of Apple's Project Catalyst, which lets developers easily port apps from iOS to the next major version of macOS, dubbed Catalina. Based on what Apple shared on stage at WWDC 2019, you should expect Twitter's Mac application to be quite similar to the version youu're using on your iPhone.