Use the link below provided by the United States Postal Service, FYI some shared addresses (like apartment buildings) have had issues where one person say (1 Smith Way Apt 1) ordered the test first and therefore everyone after living on 1 Smith Way request for test would be rejected. The feds say they are working to fix the problem.
https://special.usps.com/testkits
Monterey compatibility October 2021.
• MacBook models from early 2016 or later
• MacBook Air models from early 2015 or later
• MacBook Pro models from early 2015 or later
• Mac mini models from 2014 or later
• iMac from 2015 or later
• iMac Pro (2017 and later)
• Mac Pro models from late 2013 and later
Big Sur compatibility
Big Sur was the version of macOS that arrived on some Macs in November 2020. Here's a list of the Macs that can run macOS Big Sur:
• MacBook models from early 2015 or later
• MacBook Air models from 2013 or later
• MacBook Pro models from 2013 or later
• Mac mini models from 2014 or later
• iMac from 2014 or later
• iMac Pro (all models)
• Mac Pro models from 2013 and 2019
Catalina compatibility
Catalina arrived in October 2019 and can run on the following Macs:
• MacBook (2015 to 2017)
• MacBook Air (Mid-2012 to 2019)
• MacBook Pro (Mid-2012 to 2019)
• Mac mini (Late 2012 to late-2018)
• iMac (Late 2012 to 2019)
• iMac Pro (all models)
• Mac Pro models from 2013
Mojave compatibility
Mojave arrived in September 2018 and can run on the following Macs:
• MacBook (Early 2015 to 2017)
• MacBook Air (Mid 2012 to 2017, because it's the same as 2015 model)
• MacBook Pro (Mid 2012 to 2018)
• Mac mini (Late 2012 to late-2018)
• iMac (Late 2012 to mid-2017)
• iMac Pro (all models)
• Mac Pro (Late 2013, plus mid-2010 and mid-2012 models with recommended Metal-capable GPU)
High Sierra compatibility
High Sierra arrived in September 2017 and can run on the following Macs:
• MacBook (Late 2009 to 2017)
• MacBook Air (Late 2010 to 2017, which is same as 2015 model)
• MacBook Pro (Mid 2010 to 2017)
• Mac mini (Mid 2010 to 2014)
• iMac (Late 2009 to mid-2017)
• Mac Pro (Mid 2010 and 2013)
Sierra compatibility
Sierra arrived in September 2016 and can run on the following Macs:
• MacBook (Late 2009 to 2017)
• MacBook Air (Late 2010 to 2017, which is same as 2015 model)
• MacBook Pro (Mid 2010 to 2015)
• Mac mini (Mid 2010 to 2014)
• iMac (Late 2009 to 2015)
• Mac Pro (Mid 2010 and 2013)
El Capitan compatibility
El Capitan arrived in September 2015 and can run on the following Macs:
• MacBook (Early 2015 to 2017)
• MacBook (Late 2008 to 2010)
• MacBook Air (Late 2008 to early 2015)
• MacBook Pro (Mid/Late 2007 to early 2015)
• Mac mini (Early 2009 to 2014)
• iMac (Mid 2007 to mid-2015)
• Mac Pro (2008, 2010, 2013)
Yosemite compatibility
Yosemite arrived in October 2014 and can run on the following Macs:
• MacBook (Late 2008 to 2010)
• MacBook Air (Late 2008 to mid 2013)
• MacBook Pro (13" Mid-2009 to mid 2014)
• MacBook Pro (15" Mid/Late 2007 to mid 2014)
• MacBook Pro (17" Late 2007 to 2011)
• Mac mini (Early 2009 to 2012)
• iMac (Mid-2007 to mid-2014)
• Mac Pro (2008 and 2010)
Mavericks compatibility
Mavericks arrived in October 2013 and can run on the following Macs:
• MacBook (Late 2008 to 2010)
• MacBook Air (Late 2008 to mid 2013)
• MacBook Pro (Mid 2007 to early 2013)
• Xserve (Early 2009)
• Mac mini (Early 2009 to 2012)
• iMac (Mid 2007 to early 2013)
• Mac Pro (Early 2008 and 2010)
Mountain Lion compatibility
Mountain Lion, the last of the 'cat' versions of macOS launched in July 2012 and can run on the following Macs:
MacBook (Late 2008 to 2010)
• MacBook Air (Late 2008 to mid 2012)
• MacBook Pro (Mid/Late 2007 to mid-2012)
• Mac mini (Early 2009 to 2011)
• iMac (Mid-2007 to 2011)
• Mac Pro (Early 2008 and 2010)
