OWC Memory. 100% Built for Your Mac. Experience your Mac's true performance potential. | Improve System Speed

OWC Memory is the most cost effective and simple DIY upgrade you can install to unleash your Mac's full potential and speed up overall responsiveness.

More Apps. More Files

Become a multi-tasking maven when you upgrade your Mac with OWC Memory. Open more apps. Open larger files. Plus, work with multiple files all at the same time.

Save $$S vs Factory

Save BIG vs factory Mac memory options. Plus, select among options not offered by the factory. OWC makes it easy to find the perfect upgrade to fit your needs.

Lab Tested Compatibility

We test every OWC memory module at our in-house lab so you can upgrade with the confidence that your memory is 100% compatible with your Mac.

Lifetime Warranty

We build OWC Memory upgrades to meet or exceed Apple's specs and provide years of worry-free service.

Step-by-Step Videos

Our detailedinstall videosguide your upgrade from start to finish. We provide all the steps to make your OWC Memory upgrade DIY easy.

Experience the OWC Difference

Rely on the trusted name for memory upgrades, drives and accessories for over 30 years. Your OWC Memory upgrade was built by Mac people, for Mac people. Ourexpert support teamis always a call or click away. You can talk to an actual human who will kindly provide advice and guidance for any questions you may have.

Being helpful and treating others the way you would want to be treated is not just a novel idea. It's how we do business. It's how we're built. It's what we've been doing since 1988.

• Notebook
• MAC

Apple iMac 4K 2017 (21.5")