# Overview > [!CAUTION] > This is a derivative of [nektos/act](https://github.com/nektos/act) between version v0.2.71 from January 2025 and v0.2.72 February 2025 - Support for macOS VMs using tart `-P tart://` - `--use-new-action-cache` has been removed, the default clone mode of nektos/act has been removed - CI tests are run in 6min compared to 17min on nektos/act - Flags `--pull=false` and `--rebuild=false` are inverted to `--no-poll` and `--no-rebuild` # Act User Guide Please look at the [act user guide](https://actions-oss.github.io/act-docs/) for more documentation. # Support Need help? Ask on [Discussions](https://github.com/actions-oss/act-cli/discussions)! # Contributing Want to contribute to act? Awesome! Check out the [contributing guidelines](CONTRIBUTING.md) to get involved. ## Manually building from source - Install Go tools 1.24+ - () - Clone this repo `git clone git@github.com:actions-oss/act-cli.git` - Run unit tests with `make test` - Build and install: `make install`