Virtualization Software Users Report macOS Catalina 10.15.6 Bug Causing System Crashes
macOS Catalina 10.15.6 seems to have introduced a bug that causes system crashes, especially when using virtualization software such as VirtualBox or VMware. Users of virtualization software have reported that macOS 10.15.6 crashes repeatedly when running virtual machines. A regression in the App Sandbox component of macOS 10.15.6 is reportedly leaking kernel memory, causing macOS to crash. The purpose of an App Sandbox is to provide protection to system resources and limit an app's access to resources, such as memory.