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Upgrading an older iMac's PCIe SSD: Third-party solutions that save you beaucoup bucks | Macworld
2013 iMac teardowns reveal SSD slots, soldered-in CPU in the 21.5” model | Ars Technica
Apple iMac 21.5” SSD Upgrade (2013-2015) HDD To Solid State Drive (SATA) | Step By Step - YouTube
How to Upgrade iMac Hard Drive or SSD 2012-2022: EveryMac.com
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