

You can see the complete new change log details about VirtualBox 6.0 on their Official Changelog Page. Added support for using Hyper-V on Windows host.vboximg-mount utility for hosts enables users to access the content of guest disks on the host.A major update of 3D graphics device emulation on Linux guests.A new file manager allows user to manage the guest file system and copy files between host and guest.A Major rework of user interface with smooth and easy setup of virtual machines.A much improved HiDPI and scaling support, along with superior detection and per-machine configuration.Added support for exporting a virtual machine to Oracle Cloud Infrastructure.So, to install VirtualBox on 32-bit Linux Mint machine, you would need to go for the earlier version which is VirtualBox 5.2.

VirtualBox 6.0 does not support 32-bit hosts.
