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macOS and Linux VMs on Apple Silicon to use in CI and other automations
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Dal Rupnik c596672c5a refactor: receive file promises straight into the drop zone 
Previously promised files (Photos/Mail/browser drags) were received into
a host-private staging dir and then copied a second time into the shared
drop zone. Now each promise is received directly into its per-item
dropRoot/<uuid>/ subdir, so the source app writes it exactly once.

Plain file/dir drags still stream through copyTree (progress +
cancellation). Promises show an indeterminate bar (no byte progress is
available from the promise API) and relocation uses the actual written
names so provider de-duplication is honored. relocate() now reaps the
subdir by emptiness rather than unconditionally, so a multi-file promise
sharing one subdir isn't deleted out from under its pending siblings.
 		2026-05-20 10:15:08 +02:00
.ci Fixed plist file in version update (#927) 2024-10-29 13:01:47 +04:00
.github Add build workflow for testing (#1180) 2026-01-23 09:41:13 -05:00
Resources Add Liquid Glass icon and sign the whole app bundle (#1216) 2026-03-20 23:19:21 +01:00
Sources/tart refactor: receive file promises straight into the drop zone 2026-05-20 10:15:08 +02:00
Tests/TartTests fix: harden drag-and-drop against the edge-case report 2026-05-20 10:15:08 +02:00
benchmark Mention macOS Tahoe everywhere instead of macOS Sequoia (#1208) 2026-03-02 08:50:29 -05:00
docs docs: clarify that nested virtualization is only for Linux VMs for now (#1233) 2026-05-12 21:45:18 +00:00
integration-tests docs: clarify that nested virtualization is only for Linux VMs for now (#1233) 2026-05-12 21:45:18 +00:00
scripts Add Liquid Glass icon and sign the whole app bundle (#1216) 2026-03-20 23:19:21 +01:00
.cirrus.yml Skip integration test gate for release (#1229) 2026-04-11 22:33:36 -04:00
.editorconfig Switch to OpenTelemetry (#1179) 2026-01-23 12:04:21 +01:00
.gitignore feat: Add disk image format selection with ASIF support (#1094) 2025-06-19 18:27:30 +04:00
.goreleaser.yml Move brew completions to post_install (#1227) 2026-04-11 22:26:52 -04:00
.swiftformat Reformat code idents and introduce the SwiftFormat linter (#339) 2022-11-29 15:56:13 +00:00
CONTRIBUTING.md feat: prioritize pruning of old SHA when pulling updated tags (#1102) 2025-07-07 08:52:05 +00:00
LICENSE Relicensed under Fair Source License (#415) 2023-02-28 12:22:25 -05:00
PROFILING.md Mention macOS Tahoe everywhere instead of macOS Sequoia (#1208) 2026-03-02 08:50:29 -05:00
Package.resolved Switch back to github.com/open-telemetry/opentelemetry-swift upstream (#1189) 2026-02-02 19:40:24 +01:00
Package.swift Switch back to github.com/open-telemetry/opentelemetry-swift upstream (#1189) 2026-02-02 19:40:24 +01:00
README.md Update README example to use macOS Tahoe (#1101) 2025-07-07 13:50:16 +04:00
actool.sh Add Liquid Glass icon and sign the whole app bundle (#1216) 2026-03-20 23:19:21 +01:00
gon.hcl Add Liquid Glass icon and sign the whole app bundle (#1216) 2026-03-20 23:19:21 +01:00
mkdocs.yml docs: migrate "Managing VMs" section to "Quick Start" (#1196) 2026-02-13 05:18:14 -05:00

README.md

Tart is a virtualization toolset to build, run and manage macOS and Linux virtual machines (VMs) on Apple Silicon. Built by CI engineers for your automation needs. Here are some highlights of Tart:

  • Tart uses Apple's own Virtualization.Framework for near-native performance.
  • Push/Pull virtual machines from any OCI-compatible container registry.
  • Use Tart Packer Plugin to automate VM creation.
  • Easily integrates with any CI system.

Tart powers Cirrus Runners service — a drop-in replacement for the standard GitHub-hosted runners, offering 2-3 times better performance for a fraction of the price.

Many companies are using Tart in their internal setups. Here are just a few of them:

Note: If your company or project is using Tart please consider sharing with the community.

Usage

Try running a Tart VM on your Apple Silicon device running macOS 13.0 (Ventura) or later (will download a 25 GB image):

brew install cirruslabs/cli/tart
tart clone ghcr.io/cirruslabs/macos-tahoe-base:latest tahoe-base
tart run tahoe-base

Please check the official documentation for more information and/or feel free to use discussions for remaining questions.