best project management program

Well, we are not Apple but end users like you.

Apple does not have its own PM program. When I search the Mac App Store (an app already on your Mac) for "project management," I see a number of third-party options. You might review those.

I seldom see Apple "recommend" a program. Sometime they do a "featured" app in the App Store app store but those look like paid product placement.

There’s no such thing as best, no single budget, no single project scale, no single set of requirements, etc.

If your existing project team somehow does not have suggestions of what to use or what to avoid, start here:

https://en.wikipedia.org/wiki/Project_management_software

https://en.wikipedia.org/wiki/Comparison_of_project_management_software

I’ve used MantisBT and Microsoft Project, and met teams using bug-tracking tools here, too; Bugzilla or otherwise.

The folks at Apple do not offer a project management tool.

I've used Microsoft Project Professional. Your needs may be different. Do you need scheduling, timekeeping, reporting, sales, etc.? It is of no value for us to recommend an app without knowing your requirements. There are 100s of PM apps out there with varying functionality. Only you know your needs.

Do you work for a company? Do you have team members working on the project? Get the company or other team members' recommendations.