Earlier, macOS Catalina 10.15.4 was officially launched, but the problem can be considered a lot, and recently Catalina launched a supplemental update, which fixed many problems, but I still have to wait for the introduction of 10.15.5 to solve the problem when copying large-capacity files. If the user has not yet upgraded to macOS 10.15.4, it is recommended to wait a moment and do not upgrade.
- Fixed an issue where Mac computers running macOS Catalina 10.15.4 could not join FaceTime calls on devices running iOS 9.3.6 and earlier or OS X El Capitan 10.11.6 and earlier
- Addresses an issue that may prompt you to repeatedly enter the password for your Office 365 account
- Fixed an issue where the MacBook Air (retina display, 13-inch, launched in 2020) might freeze when using the Setup Assistant or disconnecting and reconnecting a 4K or 5K external display
- Addressed an issue where the USB-C port of the Mac might be unresponsive