Open With menu getting loaded with duplicate application entries? Nice one Apple. Here are instructions on how to remove duplicates from the OS X Finder Open With menu.
Having ACL and permission problems on OS X? Here are the best tools for manually sorting them out. Most are free. The best one is $5.
Instructions on how to use free command line tools in Terminal to extract RAR archives on Mac OS X, updated through to version 10.10.x Yosemite.
Here is an easy and free way to repair complete yet corrupt RAR archive files. It’s done in the command line of Terminal using some powerful free RAR utilities.
Here’s an easy effective way to test a split RAR archive for damaged files. Easily discover which file(s) are corrupt, and then you may be able to repair them
Step by step instructions on how to install a free command line UnRAR tool into Mac OS X. Will allow you to test and extract RAR archive files in the Terminal Command Line.