How can I install a library/program on my MacBook that will allow me to handle large integers in C++?

[SMF]

I am writing a program that involves working with extremely large numbers that are too large to be supported by any C++ types. I've done some research and found that I need to install an external library that will allow me to work with such numbers. I'm fairly new to C++ and am unsure as to how I can install such libraries safely and effectively. In the past, I've worked with Python which can already work with arbitrarily large numbers, so I don't have much experience with coding with software that does not already have this built-in capacity. The tutorials for installing the libraries that I've looked at have been a bit too difficult for me to understand and I haven't actually been able to download a library yet (I've tried downloading the GNU MP Bignum Library and the Boost Multiprecision Library). Could anyone please provide an easy-to-understand explanation/link to an explanation of how I can install a library on my MacBook that will allow me to work with large integers in C++? (I'm using Xcode to write my code, if this makes any difference).

I appreciate your help.

[Thomas1965]

You could try this one: https://github.com/panks/BigInteger
Just add the .cpp file to your project and include the header - nothing to install.