VirtualBox answers the cheap questions: is this program safe, does the new system suit me, how does this code behave on another distribution. Free, open source, hosted on Windows, macOS and Linux, with snapshots that turn any experiment into something you can undo in one step.

The desktop hypervisor for macOS is now free for commercial, educational and personal use. Full x86 virtualisation on older Macs, hardware accelerated ARM machines on newer ones, snapshot trees, linked clones and encrypted disks.