Dedicated 3D print preparation for Mac
A focused model preparation workflow for Mac.
Meshworthy combines model diagnosis, repair review, assembly planning, file integrity checks, and resin cavity analysis in one macOS application.
Application scope
Model preparation in one application.
General modeling applications cover creation and editing across many disciplines. Meshworthy concentrates on the checks and controlled operations required before a model moves into slicing.
Exact diagnosis, explainable repair, build-volume-aware splitting, calibrated joinery, safe hollowing, measurement, metadata integrity, and verified export.
What it deliberately leaves outSculpting, CAD, support generation, slicing, G-code, cloud processing, and a general-purpose modeling workspace.
What preflight checks.
A model can look fine in a viewer and still fail in the slicer or on the printer. Preflight looks for the causes before you spend filament or resin: open boundary edges, non-manifold edges, flipped faces, self-intersections, disconnected shells, a scale that is off by a unit, features thinner than the printer can resolve, connectors that will not fit, 3MF color and material data that an edit would drop, and resin cavities with no way out.
Each of those has a cheap fix when you find it on screen and an expensive one when you find it after a failed print. Meshworthy puts them in one place, shows where each problem sits in the model, and checks the file you export instead of the copy in memory.
Where it sits in a Mac workflow.
- Make or download the model. Use your modeling app, or take a file from a model site.
- Run preflight in Meshworthy. Inspect findings, protect intentional features, and apply only the changes you reviewed.
- Slice in your slicer. Supports, print settings, and toolpaths stay with the tool that owns them.
- Print and assemble. Connectors tuned with a test print fit the printer and material you tested on.
Workflow comparison
Compare common preparation steps.
| Capability | General mesh workflow | Meshworthy |
|---|---|---|
| Maintained for current macOS | Varies by tool | Built for Apple silicon |
| Exact defect inspection | Technical or limited | Clickable geometry + consequence |
| Repair transparency | Result-only | Change map + measured deviation |
| Intentional opening protection | Manual workaround | Intent Guard constraints |
| Large-model splitting | Basic plane cut | Build-volume and seam-aware plans |
| Connector calibration | Manual construction | Printer/material profile + joint test |
| Resin hollow validation | Visual inspection | Cavity graph + verified drain paths |
| 3MF semantic integrity | Often partial | Colors, materials, transforms, extensions |
| Model privacy | Depends on workflow | Local, no account, no upload |
Category-level comparison based on common workflow patterns. Individual tools and versions vary.
Built for Apple silicon, and private by construction.
Meshworthy runs natively on Apple silicon Macs and is distributed through the Mac App Store. Model parsing, diagnostics, geometry operations, and export validation happen on your Mac. There is no account to create and no cloud service that receives your files. The privacy policy explains separately what the website and email list collect.
Free to diagnose, one payment to repair.
Opening a model, inspecting every defect in 3D, measuring, and exporting a clean copy cost nothing. The Meshworthy Pro unlock is a single $19.99 purchase that adds repair, build-volume-aware splitting, calibrated joinery, hollowing, orientation, and batch processing. It is never a subscription.
Want to try the checks first? The free browser tools inspect STL and 3MF files and generate a clearance test without leaving the page.
Questions about preflight on Mac.
What is 3D print preflight?
Preflight is the set of checks you run on a model after you finish editing it and before the slicer builds toolpaths: geometry defects, scale, thin features, assembly fit, 3MF project data, and resin cavities. Meshworthy prepares and verifies the model; your slicer still creates the toolpath.
Is Meshworthy a slicer?
No. It does not generate supports, print settings, toolpaths, or G-code. You keep using the slicer you already know and hand it a model that has been checked.
Which file formats does it open?
STL, OBJ, 3MF, and PLY, including units, transforms, colors, and materials stored in supported 3MF structures.
Does Meshworthy upload my models?
No. Model parsing, diagnostics, geometry changes, and export validation run locally on your Mac, and no Meshworthy account is required.
What does Meshworthy cost?
The Mac app is free to download. Diagnosing a model, inspecting every defect, and measuring are free. A one-time Meshworthy Pro unlock of $19.99 adds repair, splitting, hollowing, orientation, and batch processing, with no subscription.
Apple silicon support
Know before you print.
On the Mac App Store. Diagnosis is free; Pro unlocks repair and preparation for $19.99, once — never a subscription. Model processing stays local.
Get Meshworthy for Mac ↗