If you want to install WordPress on a Mac, or a PC, for local testing and development, you can do it for free, using MAMP. I recently uploaded a screencast to YouTube showing how easy it is to get started.
WordPress is free, MAMP is free* so what are you waiting for?
Install WordPress on a Mac – Video
In the video I mention where to download the installers. Here are the links:
Download WordPress: https://wordpress.org/download/
Download MAMP: https://www.mamp.info/en/downloads/
* The MAMP download package for Mac OS X contains both the free version of MAMP and a 14 day trial of MAMP Pro. You can use the free version without needing MAMP Pro and it is the free version I use in the video. However, there are lots of reasons that you might want to pay the £39.00 fee for the full Pro version. Read more here: https://www.mamp.info/en/mamp-pro/
I am also using Pressmatic for my local development environment. I will be posting more details about this soon, but in the meantime you can visit pressmatic.io for information.WordPress Dynamic websites, MAMP, Website designer, WordPress Theme Design