So if you’ve got a 2015 iMac and are considering the 2017 upgrade for the increased RAM limit, you may want to try a RAM upgrade instead. While it’s good to see Apple raise the “official” limit, the previous 2015 27-inch iMac also supported 64GB of RAM just fine, even though Apple’s official limit was only 32GB. Apple noted during the iMac section of the keynote that its mid- and high-end 2017 27-inch iMac models now support a maximum of 64GB of RAM.

So here’s a quick rundown of what we know so far when it comes to system memory on these new iMacs. Keeping with this awkward tradition, the RAM situation for Apple’s new iMacs is still just as confusing. From highly inflated RAM upgrade prices, to non-user-upgradeable RAM in most of its Mac configurations, to conflicting “official” RAM limits, things can be a bit confusing these days for anyone looking to buy or upgrade a Mac. Apple fans know that the company has a bit of an odd relationship with consumers when it comes to Mac RAM. Sporting the latest hardware - including Kaby Lake processors, AMD RX 580 GPUs, Thunderbolt 3, and even faster NVMe flash storage - the new iMacs finally provided the serious upgrade that all-in-one Mac fans had been waiting for.īut one technical specification of the new systems introduced a few quirky notes and caveats: the RAM. One of the major product announcements during Apple’s action-packed WWDC 2017 keynote this week was the updated iMac.

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