How to Download and Install OrcaSlicer on Windows, macOS, or Linux
Go to the official OrcaSlicer website and use its download section to get the build for your operating system — Windows, macOS, or Linux. OrcaSlicer is a free, open-source FDM slicer licensed under AGPL-3.0, and it runs on all three platforms. The steps below cover picking the right package, installing or extracting it, launching it, and fixing the most common first-run problems.
Before you start
- Confirm you're on the official site (orcaslicer.com) rather than a mirror or third-party download page.
- Know your OS and, where relevant, your CPU architecture (Intel/AMD vs. Apple Silicon on macOS; x86_64 vs. ARM on Linux).
- Have permission to install software on the machine (admin rights on Windows, ability to move apps to Applications on macOS, or write access to a local directory on Linux).
Download OrcaSlicer
- Open the official OrcaSlicer website.
- Find the download section (the site presents a "Get OrcaSlicer" entry point).
- Select the package that matches your operating system:
- Windows — a Windows installer or build.
- macOS — a macOS build; choose the one matching your chip if separate Intel and Apple Silicon packages are offered.
- Linux — a Linux package; pick the format that fits your distribution and architecture.
- Save the file to a location you can find, such as your Downloads folder.
The site describes OrcaSlicer as free and open source, so there is no purchase step in this flow. If a page asks for payment to download the slicer itself, you are not on the official source.
Install or extract
Windows
Run the downloaded installer and follow its prompts. If Windows SmartScreen or your browser flags the file, verify you downloaded it from the official site before choosing to keep or run it.
macOS
Open the downloaded package and move OrcaSlicer into your Applications folder. On first launch, macOS may block an app from an unidentified developer — you can allow it through System Settings > Privacy & Security rather than disabling security globally.
Linux
Depending on the package you chose, either install it with your distribution's package tooling or extract the archive to a folder and run the executable inside. If the app won't start, check that any runtime dependencies your package expects are present.
Launch and verify
- Open OrcaSlicer from your applications menu, Applications folder, or extracted directory.
- Confirm the main workspace loads — you should see the familiar slicer layout (model area, settings panels, and slicing controls).
- Check the version and license information in the app's About section. OrcaSlicer is AGPL-3.0 licensed, so the license should be visible there.
- Optional but useful: confirm the built-in calibration tools are present, since these ship inside the slicer rather than as separate test files.
If the app opens and shows its workspace, the install is complete and you're ready to add a printer profile and slice.
Common problems and fixes
| Symptom | Likely cause | What to do |
|---|---|---|
| Download blocked by browser or OS | Security flag on an unfamiliar file | Re-download from the official site, then allow the file |
| macOS refuses to open the app | Gatekeeper blocking an unidentified developer | Allow it via System Settings > Privacy & Security |
| Linux app won't launch | Missing runtime dependency or wrong architecture package | Install the dependency or grab the build matching your CPU |
| Wrong build installed | Picked a package for a different OS or architecture | Remove it and download the correct package |
| Can't find the download | Landed on a non-official page | Return to orcaslicer.com and use its download section |
After install
Once OrcaSlicer launches, the next steps are selecting or importing a printer profile — the slicer includes tuned presets for Bambu Lab, Prusa, Creality, Voron, and many other machines — and running a calibration if you're dialing in a new printer or filament. The calibration suite (flow rate, pressure advance, temperature towers, retraction, tolerance, and max volumetric speed) is built into the slicer, so you don't need to download separate test models.