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How to Upgrade Your macOS [Guide]
How to Prepare Your Mac for macOS High Sierra - The Mac Security Blog
Identify your iMac model - Apple Support
Macs Able to Run macOS Sierra Remain Compatible With High Sierra - MacRumors
iMac (Early 2009) | Low End Mac
Amazon.com: Technical support plus Bonus bootable DVD DL for Mac OS X 10.12 Sierra Full OS Install Reinstall Recovery Upgrade
MacOS High Sierra Compatible Macs List | OSXDaily
How to Prepare Your Mac for macOS High Sierra - The Mac Security Blog
Hard Drive for iMac Late 2009-2011 ONLY 500GB, Preloaded with High Sierra 10.13 | eBay
/DefaultDesktopSierra-577e96125f9b5858751c6d42.jpg "The Minimum Requirements for Running macOS Sierra")
The Minimum Requirements for Running macOS Sierra
How to Install macOS High Sierra - iFixit Repair Guide
Amazon.com: Bootable DVD DL for Mac OS X 10.13 High Sierra Full OS Install Reinstall Recovery Upgrade
Apple macOS Sierra: how about that compatibility list? (2022)
Apple iMac 27″ Late 2009 Core i7 2.8GHz 8GB 1TB DVDCDRW Wifi macOS 10.13 High Sierra – Refresh Computers Online Marketplace
2009 iMac 27"- Refurbished - MacTek - Computer & Phone Repair & IT Support
Hard Drive for iMac Late 2009-2011 ONLY 500GB, Preloaded with High Sierra 10.13 | eBay
List of Macs Compatible With macOS Sierra - MacRumors
10 Things You Need to Know About macOS Sierra | PCMag
How to Prepare Your Mac for macOS High Sierra - The Mac Security Blog
PSA: macOS Sierra drops support for many Macs from 2007, 2008, and 2009 | Ars Technica
Identify your iMac model - Apple Support
How to Install macOS High Sierra on an Unsupported Mac - YouTube
Anything that can run macOS Sierra can also run macOS High Sierra | Ars Technica
