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How many macOS VMs can we run in parallel? #4

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@ipavlidakis

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Hey, thanks for the great product. I'm interested in using this to run multiple macOS VMs on the same machine so that agents can get their own isolated box to run simulators without conflicts. I remember by using Tart that only 2 macOS VMs are allowed to run in parallel and apparently this limitation comes from Apple's Virtualisation framework. Is the same limitation applied to VMPal?

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  1. huyphams commented on Oct 6, 2026

    @huyphams
    Contributor

    Only two. This is the hard limit of Apple as they are against running macOS on a virtual machine. We're still trying to find a way. A possible solution is a Hackintosh.

  2. huyphams commented on Oct 20, 2026

    @huyphams
    Contributor

    Hi @ipavlidakis, two at a time. Apple’s macOS license and Virtualization framework allow two running macOS VMs per Mac, counting every app’s VMs, so VMPal has the same limit as Tart. A correction to our earlier reply: a Hackintosh isn’t an option, because VMPal runs only on Apple silicon.

    What you can do:

    • Keep as many macOS VMs as you like. Suspended and shut-down VMs don’t count, and VMPal offers to suspend one when you start a third.
    • Run several iOS Simulators in one macOS VM, one per agent.
    • Linux and Windows VMs and containers have no such limit.

    Running VMs across several Macs is tracked in #59. Closing as answered.

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