TeXstudio is a decent and free TeX editor on the Mac. One aspect of it bothered me, though: It uses too much CPU for no obvious reason. Even when no tex documents are open, it (version 2.10.8) does *something* very CPU intensive every ~8 seconds. On a desktop computer this wouldn’t be much of a hassle, but on a laptop unnecessary mean wasted energy and less battery life. With TeXstudio on a MacBook Pro it actually means several hours less battery life.
Using the Activity Monitor I found TeXstudio to frequently scan for network interfaces and nearby Wifi networks. That is very odd for a TeX editor and I cannot think of a good reason for it to do so.
Apparently, libqcorewlanbearer.dylib is involved. Simple fix: Delete it.
$ rm /Applications/texstudio.app/Contents/PlugIns/bearer/libqcorewlanbearer.dylib
TeXstudio will continue to work just fine but will use way less energy doing so. Why does this matter? Because it is spring and I want to work outside. 😀