You could have downloaded MR Gate 5.4 for Mac from our software library for free. The MR Gate installer is commonly called MasterRestoration549.dmg. This Mac application was originally created by Wave Arts. The application belongs to Audio & Video Tools. The most popular version among MR Gate for Mac users is 5.4.
From the developer:
MR Gate is a full featured expander/gate that can be used to gate noise during quiet sections. It’s a very comprehensive gate implementation with adjustable lookahead, variable ratio, attack and decay times, etc. In addition, it has a scrolling time display that shows the level of the input signal and the gate attenuation, very handy for setting up the parameters.
You may want to check out more software for Mac, such as Logic Gate Value Calculator, Mr Word Lite or Gate 88, which might be similar to MR Gate.