gSwitch lets you set which graphics card your MacBook pro can use, mainly to prevent it from using the discrete graphics card when it is simply unnecessary. Why would you want to do that you ask? Well the discrete graphics card uses significantly more power than the integrated one, which can ruin your battery life. There are also problems on some MacBooks with glitchy and buggy graphics card drivers that apple still hasn't fixed!
Note: While the software is classified as free, it is actually donationware. Please consider making a donation to help support development.
Updated on May 15 2020