Sam Soffes takes a look at the recently announced Ruby iOS development tool, RubyMotion.

GitHub has open sourced their reactive programming framework for OS X and iOS.

Mike Ash continues his series on crash reporting with an in-depth look at unwinding the stack on x86_64.

Mike Ash talks about DWARF debugging information, the compact unwind encoding, and stack scanners.

Seattleite iOS developers rejoice, it looks like the OneBusAway source code is now available on GitHub!

Really fast audio in iOS and Mac OS X using Audio Units is hard, and will leave you scarred and bloody. What used to take days can now be done with just a few lines of code.

An in-depth look at preloading and importing data into Core Data.

A patent application published this week indicates that Apple wants to make it easier for non-programmers to build iOS apps.

Mike Ash’s Friday Q&A looks at nib memory management, and some of the differences between OS X and iOS.

Mike Ash continues building Cocoa’s mutable collection classes from scratch, this time with NSMutableDictionary.

A new vector drawing app for OS X that outputs code for inclusion in your iOS and OS X apps. Wow.

This article from Apple takes a deep dive into debugging your busted iOS apps.

An oldie, but goodie, this article is a great way to sort out what to do next when you crash in objc_msgSend

A tutorial on Ray Wenderlich walks you through the basics of debugging your iOS app crashes.

“Between the release of the iPad 2 last year and the announcement of the new iPad yesterday, Apple has nearly doubled the capacity of the battery, taking it from 25Wh to a massive 42Wh.”

Doug Russell shows you how to get a device-unique identifier for your apps on iOS 5.0 and above.

Mike Ash shows you how to write NSMutableArray from scratch.

Rumor has it that iOS 5.1 is ready to go.

Gwynne Raskind takes a deep dive into improving KVO for modern OS X and iOS apps.

Today NSScreencast has a new video up on how to use CocoaPods in your Cocoa apps. Setting aside some minor issues with out-of-date projects, I’ve found CocoaPods to be an incredibly handy way to manage project dependencies.

Earlier this week, Insurgent Games released their many celebrated iOS and Android games as open source projects, posting the source code for download on Github. This allows aspiring game developers to learn and build their own games from the code. Also, fans can download any game for free from the iOS App Store and the Android Market.

Twilio has released version 1.0 of their iOS SDK, which will help you build awesome VOIP apps that use their platform.

A little far afield from our normal content, but I worked on Visual Studio for four years and it’s still near and dear to my heart. The new version looks a little, uh, gray, I must say.

A look at what you need to know about Gatekeeper if you plan on writing software for OS X.

Tom Harrington takes a look at NSData’s memory mapping capabilities and the intricacies of overriding methods on class clusters.

A very in-depth tutorial for aspiring iOS game developers on how to get started building your 2D iPhone masterpiece.

Registered Mac Developer Program members can download the OS X Mountain Lion Preview now.

John Gruber discusses the next version of OS X, Mountain Lion, Apple’s new release schedule, and what Mountain Lion will bring to the table.

Rogue Amoeba shows how the UI for their simple version of Audio Hijack Pro, evolved.