Yosemite beta testers got a new treat from Apple yesterday, but Cupertino is continuing to refine its next major release of Mavericks by seeding the fourth beta of OS X 10.9.5 to developers this morning.

OS X Mavericks 10.9.5 build 13F18 is light on new features but heavy on bug fixes. Apple asks developers to focus on Safari, USB, USB Smart Cards, Graphics, Thunderbolt and GateKeeper. Developers can grab the new beta from the Mac Dev Center.

Apple also released the sixth beta of OS X Yosemite yesterday that brought a bunch of new wallpapers to the Mac, new System Preference icons, and Do Not Disturb mode.

It hasn’t been a good year for Mac security so far, at least PR-wise, and it’s about to get a lot uglier: an Apple programmer forgot to turn off a debug switch in OS X 10.7.3’s security settings before the update was distributed to the public.

The result? If you’re running OS X 10.7.3, your login password might be stored in plain text on an unencrypted, easily accessed section of your hard drive.

Report after report, same old, same old: Android and iOS continue to kick everyone’s arse in the mobile market. The latest comScore report is out, and once again, these two remain the only ones gaining any market share. Android continues to lead the pack with 48.6% (up 2.3 percentage points) while iOS remains in second with 29.5% (up 1.4 percentage points). Everyone else continues to lose market share with RIM holding the third position at 15.2% (down 2 percentage points. After that it’s Microsoft with 4.4% (down 1 percentage point) followed by Symbian with 1.5% (down .1 percentage point). Overall Android and iOS occupy 78.1% of the market with no signs of slowing down.

With the news that HP is seriously reevaluating the longevity of the webOS platform, it looks like another mobile OS has fallen by the wayside.

After being largely abandoned by Nokia for Microsoft’s Windows Phone OS, Intel has announced a ‘temporary’ halt on development of Meego. The company will reportedly focus on hardware development for either the Windows Phone OS or Android.

Raskin for Mac is an intuitive Finder replacement for Mac OS, and is the single best reason to go out and buy Apple’s new Magic Trackpad: it totally transforms the desktop experience.

Raskin for Mac uses a visual interface to present all your files on a single page, allowing you to view, arrange and open documents, applications, files and images without opening the Finder. It’s like a giant zoomable photo contact sheet, and makes navigating files and applications very easy and fast. It is inspired by the work of Jef Raskin — the legendary computer interface designer and father of the Mac computing experience.