If your virtualiser allows you to run 2 macOS VMs at the same time, and to give them different MAC addresses, it’s easy to migrate from one to the other as explained here.
Viable
How to install a macOS 26 Tahoe virtual machine in macOS 15 Sequoia, with links to the software you’ll need.
A thorough run-down on which versions of my most popular free apps are compatible with which macOS, including Sequoia. From Skint to Vimy.
How to create and configure a Sequoia beta to run in a virtual machine on an Apple silicon Mac, either in Sequoia or Sonoma, and a surprise in its features.
What you need, what the risks are, and how to ensure you don’t have problems if things go wrong. Includes coverage of VMs and more.
If you use macOS VMs on an Apple silicon Mac, folders shared with the host may vanish in 14.2 and later. Here’s why, which are affected, and how to work around the problem.
If you run macOS virtual machines (VMs) on Apple silicon Macs using lightweight virtualisation, you may wish to […]
These fix a bug when restoring a VM window that has been minimised to the Dock.
How to run apps on the host, access iCloud Drive, and get faster file write performance in a macOS VM. And why Spotlight is limited, and the Force Quit dialog a bit odd.
With an Apple silicon Mac, converting PostScript and EPS files to PDF is simple once you’ve set up a Monterey VM. All in the GUI, free and effective.
The Eclectic Light Company 