MacBook Air regularly won't detect any networks
My MacBook Air (mid-2012) regularly (about once a week) will randomly stop detecting any wireless networks. My other devices connect fine. I turn off the wireless on my laptop for a while (sometimes restart it) and then it suddenly works again. This happens about once a week and sometimes takes up to 12 hours to start detecting networks again.
MacBook Air, OS X Yosemite (10.10.5)