The 2.11.2 version of PariGP for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac app is a product of PARI/GP Development. PariGP for Mac belongs to Education Tools.
From the developer:
PARI/GP is a widely used computer algebra system designed for fast computations in number theory, including factorizations, algebraic number theory, elliptic curves, modular forms, L functions, etc. The app also contains useful functions to compute with mathematical entities such as matrices, polynomials, power series, algebraic numbers, etc., and a lot of transcendental functions.
You may want to check out more software for Mac, such as Gee, Arcade Math Blocks or NLVM, which might be related to PariGP.