Got an old Mac that badly needs a software update? Apple finally dropped the $19.99 fee for Mac OS X Lion and Mountain Lion, allowing users to download them for free for the first time.

Tired of right-clicking (control-click or two-finger click on trackpads) on a file and seeing a ton of duplicates in the Open With… contextual menu pop up? Not only is it aesthetically annoying, it takes up valuable real estate on smaller screens, and makes you move your mouse cursor more than you should, which could lead to repetitive-stress injuries. Or, you know, a tired finger or three.

Anyway, if you want to get rid of those duplicates, try the following.

I ran across an issue yesterday in trying to support a Macbook Pro at work. We wanted to reformat the Macbook to a clean system install, but we had no system disk for the computer (it was lost in the move to our new offices), and we didn’t know the admin password for the Mac. I thought we were out of luck, until I ran across a solution in Apple’s discussion forums that showed me how to reset the admin password without a system disk. I figured I’d share this process here, hoping it helps some of you out.

Apple was expected to send out invitations to an upcoming iPad mini announcement on October 10, but that date has now come and gone, and we’re still left wondering when the tiny tablet is going to get its grand unveiling. Recent reports have suggested that the device has been postponed due to production delays, but according to AllThingsD, that’s not the case.

Instead, Apple will be holding its event on October 23, sources claim — just three days before Microsoft’s new Surface tablet begins shipping in the United States.

Apple has quietly released two supplemental updates for OS X Mountain Lion and Lion today. The first supplemental update for OS X 10.8.2 is available now in the Mac App Store, and a similar update to 10.7.5 has also been made available. Both updates contain small bug fixes.

After unveiling its latest Kindle lineup last week, Amazon has updated its Kindle app for Mac OS X to introduce support for new books that employ the Kindle 8 format. It also adds OS X Lion gestures and a number of improvements.

Notefile, a popular note-taking app for iOS, developed by Junecloud, has made the leap to Mac. Priced at $4.99 in the Mac App Store, the app offers cross-platform sync between your Mac and iOS devices, high-resolution artwork for the Retina MacBook, and all the features you’ve been enjoying on iOS.

Apple has seeded a new OS X Lion build to registered developers this morning, less than two weeks after the previous build was seeded through the Apple Dev Center. This one comes with build number 11G45.

Apple has seeded a new OS X Lion 10.7.5 build to registered developers through the Apple Dev Center. It comes with build number 11G36, and weighs in at 1.15GB for the delta release, or 1.92 GB for the combo update.

Microsoft Office 2011 looks awful on the new MacBook Pro’s Retina display. But unfortunately for its customers, it seems Microsoft has no plans to add high-resolution graphics. While Outlook 2011 does have Retina graphics, the company has confirmed that the rest of the suite will have “the same viewing quality as on any non-Retina device.”