A new rumor is suggesting that Apple may considering switching from Intel processors to ARM-based processor architecture in future versions of their laptop, and perhaps even desktop, computers. The report comes from SemiAccurate (via MacRumors) who suggest that the move would take place when ARM chips possess full 64-bit cores in the next generation of processors with the site suggesting that this would take place in mid-2013.
ARM processors have been used by Apple already in their iOS mobile device line-up to great success with the latest version, the A5, being incorporated into the iPad 2. However, moving Macs over to ARM would be a little more tricky with Mac applications not having any native capability for running on ARM processors. As MacRumors points out, developers would have to recompile their applications to make them compatible for ARM based systems.
Whether or not this rumor actually pans out remains to be seen. The new Intel Sandy Bridge processors, found in the 2011 MacBook Pro and recently released iMacs, deliver impressive improvements in performance with efficiency and low power consumption. While ARM processors are noted for their low power use, it remains to be seen whether it is worth the effort for Apple to move their entire Mac line over to ARM processors. Especially for developers.