Yesterday, Apple had started rolling out the third beta version of iOS 13.3.1, iPadOS 13.3.1, tvOS 13.3.1, and watchOS 6.1.2 operating systems to developers. And now it is time for Macs. The Cupertino-based tech giant has now started seeding the macOS Catalina 10.15.3 Beta 3 to the developers. The new firmware comes a week after the brand had rolled out the second beta and nearly a month after it pushed out the original macOS Catalina 10.15.3. Developers can download the new firmware from the Software Update center in System Preferences.