Manual:Running MediaWiki on macOS
The primary development and deployment environment for MediaWiki is on Linux and Unix systems; Mac OS X is Unix under the hood, so it's fairly straightforward to run it.
Instead of setting the required software up separately you might be better off to start with MAMPstack + MediaWiki, which gives you Apache, MySQL, PHP & MediaWiki in one convenient package.
For a personal Wiki environment, you may find it easier to install MAMP, if you are using Mac OS X 10.4 or newer (MAMP will not run on Mac OS X 10.3 or older). This installer will provide its own Apache, MySQL and PHP (with eAccelerator (an updated MMCache) and Zend Optimizer) and a nice simple control panel, running under your login (in other words, this really isn't configured to work as a production server, so don't do that). If you turn off the Mac's built-in personal web server, you can run MAMP's Apache on port 80.
You will still need to install ImageMagick, but otherwise everything MediaWiki needs will be there. Note that with MAMP your personal Web directory defaults to /Applications/MAMP/htdocs instead of the Mac's usual /Users/yourname/Sites. If you don't want to store your own data files in the Applications directory, open MAMP's Preferences, select the Apache tab, and change the document root to the directory of your choice. /Users/yourname/Sites is an excellent choice. Clicking on MAMP's Open Start page button will open http://localhost:8888/MAMP/ in your browser to show you how things are configured.
See Manual talk:Running MediaWiki on Mac OS X#Mathematics for explicit instructions on how to add TeX support for MacOS X.