If you brought your Mac back from sleep only to see that your Wi-Fi isn’t working at all, even after a reboot, you might be experiencing the Wi-Fi: No hardware installed error. And luckily it’s really easy to fix. Essentially what has happened is that the MacBook lost track of which devices are supposed to …

Macs can automatically download and reinstall their operating system. This process normally keeps your personal files, but you can choose to erase them. You can also create USB installation media to speed up installing OS X on multiple Macs. This is normally a simple process — just boot to OS X Recovery and select Reinstall …

Macs can perform slowly, too. If your Mac seems to be running slower than it should, the variety of tips here should help you identify and fix the problem. As with a Windows PC, there are many reasons a Mac might be slow. Stay away from programs that promise to “optimize” your Mac and make …