Peter Cohen

It's easy to view and re-download the apps you've already purchased from the Mac App Store.

Want to make a quick change to any System Preference setting? No need to open the System Preferences app, just click it from the Dock. Here's how!

Compressing archived files can save you gigabytes of precious hard drive or SSD space. What's more, the Mac has built-in file compression that you can access in one click from the Finder.

Is your Mac's Bluetooth menu a mess of devices you no longer use? You can clean it up almost instantly!

A change to the previous version of Microsoft's AutoUpdate utility caused updates to break in Office 2011 for OS X. A fix is ready for download.

There's a lot more to OS X's Wi-Fi menu than connecting to networks. Find out how to disconnect and use wireless diagnostics with this OS X Power Tip!

Want to get notified when someone talks about you in a group message on Messages on OS X? Here's a tip.

If you want to make sure you're using the very latest version of iTunes, follow these steps!

Make the Dock as minimal as possible with a quick visit to the Terminal command line, keeping the clutter away.

If you're tired of your Mac not being ready when you are in the morning, or if you want to save electricity, you can set your Mac to start up and shut down on demand.

Gatekeeper is one of the Mac's main lines of defense against malware.

Need your Mac's serial number? If your Mac is awake, it's just one click to find it.

With an active Apple Music subscription, it's very easy to add new music to your iTunes library.

If you'd like to have instant access to recently used apps, docs, servers and other items from the Dock, some quick command line wizardry in Terminal is the ticket.

One of the best ways to get more life out of an aging Mac is to upgrade the storage. In some cases you'll want to go faster. In other cases, you'll want to go bigger.