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Upgrading an iMac Pro to 256GB of RAM Only Possible at Time of Purchase

Last week, Apple added a 256GB RAM configure-to-order option for the iMac Pro (https://www.macrumors.com/2019/03/19/imac-pro-256gb-ram-radeon-pro-vega-64x/). Unfortunately, if you already purchased an iMac Pro (https://www.macrumors.com/roundup/imac-pro/) with 128GB of RAM or less, upgrading to 256GB does not appear to be possible.





(http://cdn.macrumors.com/article-new/2017/06/imac_pro_white_background-800x585.jpg)


The new 256GB RAM option consists of four 64GB memory modules, and in an internal document distributed to Apple Stores (https://www.macrumors.com/roundup/apple-retail-stores/) and Apple Authorized Service Providers, Apple states that the new configured-to-order <!---->iMac Pro<!----> is the only model designed to work with those 64GB memory DIMMs. No reason is provided.





This information suggests that Apple Authorized Service Providers will not be able to upgrade an <!---->iMac Pro<!----> to 256GB of RAM, nor will third-parties like OWC. In other words, purchasing an <!---->iMac Pro<!----> with 256GB of RAM will only be possible via the CTO option on Apple's online store during the checkout process.





256GB of RAM is a $5,200 upgrade option on Apple's online store, in addition to the <!---->iMac Pro<!---->'s base $4,999 price.





The standard iMac (https://www.macrumors.com/roundup/imac/) is a bit more fortunate, as OWC has confirmed that the new 27-inch models released last week can be upgraded with up to 128GB of RAM (https://blog.macsales.com/47735-its-official-owcs-128gb-memory-upgrade-for-the-2019-imac-retina-5k), despite maxing out at 64GB on Apple's online store.

<div class="linkback">Related Roundup: iMac Pro (https://www.macrumors.com/roundup/imac-pro/)</div><div class="linkback">Buyer's Guide: iMac Pro (Neutral) (https://buyersguide.macrumors.com/#iMac_Pro)</div>
This article, &quot;Upgrading an iMac Pro to 256GB of RAM Only Possible at Time of Purchase (https://www.macrumors.com/2019/03/28/imac-pro-256gb-ram-only-at-time-of-purchase/)&quot; first appeared on MacRumors.com (https://www.macrumors.com)

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Source: Upgrading an iMac Pro to 256GB of RAM Only Possible at Time of Purchase (https://www.macrumors.com/2019/03/28/imac-pro-256gb-ram-only-at-time-of-purchase/)