upgrade mac yosemite
cannot upgrade latest versions of chrome on my mac
iMac Pro
Chrome requires High Sierra 10.13 or later. See: https://support.google.com/chrome/a/answer/7100626?hl=en
Your post footer shows iMac Pro but it isn't possible to have Yosemite on an iMac Pro (the iMac Pro was released in December 2017 and Yosemite is from 2014).
If you have an iMac rather than an iMac Pro, the following may help you determine whether you can upgrade it to High Sierra or later:
The model year of an iMac is available at Apple menu > About This Mac.
An early 2009 iMac can be upgraded to El Capitan 10.11.6 but no later version. See: How to download macOS - Apple Support
A late 2009 through mid 2011 iMac can be upgraded to High Sierra 10.13.6 but no later version. See: How to download macOS - Apple Support
A late 2012 through late 2013 iMac can be upgraded to Catalina 10.15.7 but no later. See: How to download macOS - Apple Support
A mid 2014 and late 2014 iMac can be upgraded to the latest version of Big Sur macOS 11 but no later. See: How to download macOS - Apple Support
A late 2015 iMac can be upgraded to the latest version of Monterey macOS 12. See:How to download macOS - Apple Support
A 2017 or later iMac can be upgraded to the current version of Ventura macOS 13. See: How to upgrade to macOS Ventura - Apple Support