This huge increase in addressable memory is practically limitless, at least for the foreseeable future. Basic answer: 32-bit systems can address a maximum of about 4 gigabytes, while 64-bit systems can address 16 exabytes (that’s 16 million terabytes, if you’re curious). Check out this ZDNet article if you’re interested in the math. What it all boils down to in the most simplistic sense is that moving to 64-bit allows the software to address more memory.
And even when it comes to just software, the benefits and implications vary wildly. In short, the move from 32-bit to 64-bit can mean many different things depending on whether we’re talking about hardware or software. These are just a few examples from Apple’s history alone, never mind the thousands of third party applications out there. It was a big deal when the A7 processor in the iPhone 5S made the leap to 64-bit. Apple made a push for 64-bit software with Snow Leopard ( sort of). Apple’s old PowerPC G5 architecture was 64-bit (which made it a tad awkward from a marketing standpoint when some of the first Intel Macs only had 32-bit processors). Most Mac users have likely already encountered the term 64-bit. What’s the Difference Between 32-bit and 64-bit? Here’s what longtime Office for Mac users need to know about the switch to 64-bit. There are, of course, still a few aspects worth knowing if you rely on Microsoft’s productivity suite. The good news is that the transition from 32-bit to 64-bit should be seamless for most users. Microsoft Office 2016 for Mac is on the verge of moving to 64-bit.
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