By Devin Culbertson
Publication Date: 2026-08-13 13:24:00
Docker has shipped the public beta of Docker VMM — a fully rebuilt, first-party hypervisor that replaces the third-party library that has powered Docker Desktop’s Linux VM since the product’s inception — and every Mac and Windows user on Docker Desktop v4.86 or later can switch to it today, with no waitlist required.
The announcement, published August 12, 2026, marks the first time Docker has owned and operated its own hypervisor code rather than relying on an external library. From Docker Desktop 4.35 through 4.85, the Mac version of Docker VMM was backed by libkrun, an open-source virtualization library. Starting with v4.86, Docker’s own hypervisor replaces libkrun on both platforms — giving the company full control over the virtualization layer for the first time.
What Docker VMM Actually Is — and Why It Matters
Docker Desktop runs Linux containers on Mac and Windows by spinning up a Linux virtual machine (VM) invisibly in the background. The component that creates and manages that VM is called a virtual machine monitor (VMM), also known as a hypervisor — the software layer sitting between your physical hardware and the containers Docker runs inside it. Most developers never interact with the VMM directly. But its performance characteristics are reflected in everything: how fast a container starts, how quickly files written on the Mac side appear inside a running container, how much of your laptop’s RAM Docker is holding onto when you step away…
