Make phone calls from mac

Use FaceTime on Mac

But making a Telephone call like via a Land-Line phone call - not possible.

Make and receive phone calls in FaceTime on Mac - Apple Support

P. Phillips wrote:

But making a Telephone call like via a Land-Line phone call - not possible.

If you have an iPhone, you can certainly call landlines using FaceTime with a Mac.

Yup :-)

Though OP has not indicated iPhone owned or not