Go to Mastercam.com > My Account > Downloads/Updates . If your reseller has provided you with a custom post, it lives in your customer portal. You do not find this via Google; you find it via your license. Option 2: The "Gray Area" (Forums & GitHub) Yes, there are repositories of user-shared posts. Sites like CNCZone , Practical Machinist , or GitHub have user-uploaded .PST and .PSB files.

Only use these for educational purposes or to reverse-engineer logic. Never run an untrusted post on a machine with a $100k part clamped in it. Option 3: The Expensive, Correct Solution (Post Modifications) If you have a unique machine (like an older Fadal, a Hardinge with a custom macro package, or a Brother Speedio with High Accuracy modes), you need a custom post.

These are often for Mastercam 2017 or 2020. Mastercam 2023 uses a newer C++ compiler for posts. A 2017 post might work, but it will likely throw "Post version mismatch" errors.

You will see files like MPFAN.PST (Generic Fanuc Mill) or MPLMaster.PST (Generic Lathe). These are great for 3-axis work, but terrible for a live-tooling Y-axis lathe.

The Great Post Processor Hunt: Why “Mastercam 2023 Post Download” Isn’t as Simple as It Sounds

The post is the soul of your CNC workflow. You wouldn't download a random brain off the internet for your body. Don't do it for your $150,000 VMC either.

C:\Users\Public\Documents\Shared Mastercam 2023\Mill\Posts