Upgrading your iMac's memory yourself is cheaper than going through AppleWhile Apple charges a premium for memory (RAM) upgrades on all of its computers, one of the best aspects of the iMac line is that RAM is user-upgradeable — at least on the 27-inch model. This means that you can skip Apple's in-house, expensive RAM upgrades and efficiently perform much more cost-effective ones yourself. Our best memory for Mac choices serves up several excellent third-party RAM upgrades that you can get right now.
For later expansion
OWC 16GB DDR4 RAM (Single stick)
Staff Favorite
This single-stick kit gives you plenty of room to expand to 32GB or even 64GB in the future should you want to.
$75 at B&H
128GB for less
Timetec Hynix 128GB DDR4 RAM
This set of four 32GB RAM sticks offers the maximum amount of memory you can put into a Mac for just a fraction of the price of Apple's upgrade option. Perfect for high-end video work and development or opening just a ton of Chrome tabs.
$476 at Amazon
Top tier for most consumers
OWC 32GB DDR4 RAM
A kit ...
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Upgrading your iMac's memory yourself is cheaper than going through Apple