i have a mid 2011 27" iMac. i cannot use zoom. how do i install zoom

Zoom Rooms Platform Requirements

• Minimum OS:
  • Mac OS X with Mac OS 10.10 and higher
  • Windows 7 and higher
• Mac OS or Windows OS hardware requirements:
  • 2.5 GHz Dual Core Intel Core i5 and higher desktop CPU (single screen)
  • 2.8 GHz Quad Core Intel Core i7 and higher desktop CPU (dual or triple screen)
  • Dual bank RAM for better performance

https://support.zoom.us/hc/en-us/articles/204003179-System-Requirements-for-Zoom-Rooms

You can upgrade to 10.11, 10.12, or 10.13, see sys requirements...

https://support.apple.com/en-us/HT206886

https://itunes.apple.com/app/os-x-el-capitan/id1147835434?ls=1&mt=12

http://updates-http.cdn-apple.com/2019/cert/061-41424-20191024-218af9ec-cf50-4516-9011-228c78eda3d2/InstallMacOSX.dmg

https://support.apple.com/kb/sp742?locale=en_US

https://itunes.apple.com/us/app/macos-sierra/id1127487414?ls=1&mt=12

https://support.apple.com/kb/sp765?locale=en_US

https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12

Any luck yet?