Graphical OS: According to Apple & Microsoft

Apple System Software 1.x (1984) = Microsoft Windows 1.01, aka “Presentation Manager” (1986)
Apple System Software 2.x (1985) = Microsoft Windows 2.x aka, “Windows 286/386” (1987)
Apple System Software 3.x (1986) = Microsoft Windows 3.0 (1990)
Apple System Software 4.x (1987) = Microsoft Windows 3.1 (1992)
Apple System Software 5.x (1987) = Microsoft Windows 3.11, aka “Windows for Workgroups” (1994)
Apple System 6.x (1988) = Microsoft Windows 95 (1995)
Apple System 7.x (1991) = Microsoft Windows 95B/95C & Windows NT 4.0 (1996)
Apple Mac OS 7.5x (1995) = Microsoft Windows 98 (1998)
Apple Mac OS 7.6x (1996) = Microsoft Windows 98SE (1999)
Apple Mac OS 8.x (1997)
Apple Mac OS 8.1 (1997) = Microsoft Windows ME, aka “Millennium Edition” (2000)
Apple Mac OS 9.x (1999) = Microsoft’s Windows XP (2001)
Apple Mac OS X – 10.0, aka “Cheetah” (2001) = Microsoft Windows Vista – Home Basic Edition (2007)
Apple Mac OS X – 10.1, aka “Puma” (2001) = Microsoft Windows Vista – Home Premium Edition (2007)
Apple Mac OS X – 10.2, aka “Jaguar” (2002) = Microsoft Windows Vista – Business Edition (2006/2007)
Apple Mac OS X – 10.3, aka “Panther” (2003) = Microsoft Windows Vista – Ultimate Edition (2007)
Apple Mac OS X – 10.4, aka “Tiger” (2005) = Microsoft Windows Vista – Ultimate plus patches (2007 – ???)
Apple Mac OS X – 10.5, aka “Leopard” (for 2007 release ???) = next Windows release for 2011 ???

– – Kupitero

Here’s an update,  Dec. 2013 — almost 6 years after:

Apple Mac OS X – 10.5, aka “Leopard” (2007) =  MS Windows 7 (2009)
Apple Mac OS X – 10.6, aka “Snow Leopard” (2009) =  MS Windows 7 with Service Pack 1 (2011)
Apple Mac OS X – 10.7, aka “Lion” (2011) =  MS Windows 8.0 (2012)
Apple Mac OS X – 10.8, aka “Mountain Lion” (2012) =  MS Windows 8.1 aka “Windows Blue” (2013)
Apple’s Mac OS X – 10.9, aka “Mavericks” (2013) =  MS Windows 8.1 with Service Pack 1 ???? (20??)
Apple’s Mac OS XI – 11.0 , aka “???” (for 2015 release???) =  MS Windows 8.2 (for 2015 or 2016)???

– – Kupitero

Here’s another update,  Nov. 2016 — almost 9 years after the initial post:

Apple Mac OS X – 10.5, aka “Leopard” (2007) =  MS Windows 7 (2009)
Apple Mac OS X – 10.6, aka “Snow Leopard” (2009) =  MS Windows 7 with Service Pack 1 (2011)
Apple Mac OS X – 10.7, aka “Lion” (2011) =  MS Windows 8.0 (2012)
Apple Mac OS X – 10.8, aka “Mountain Lion” (2012) =  MS Windows 8.1 aka “Windows Blue” (2013)
Apple Mac OS X – 10.9, aka “Mavericks” (2013) =  MS Windows 8.1 with Update  (2014)
Apple Mac OS X – 10.10, aka “Yosemite” (2014) = MS Windows 8.1 with Update & Bing (2014)
Apple Mac OS X – 10.11, aka “El Capitan” (2015) = MS Windows 10 Official Release
Apple Mac OS Sierra – 10.12 aka “Sierra” (2016) = MS Windows 10 with 1st Anniversary Update (2016)

– – Kupitero

Here’s another update,  July 2022 — almost 15 years after the initial post:

Apple Mac OS X – 10.11, aka “El Capitan” (2015) = MS Windows 10 Official Release
Apple Mac OS Sierra – 10.12 (2016) = MS Windows 10 1st Anniversary Update  (2016)
Apple Mac OS High Sierra – 10.13 (2017) = MS Windows 10 Creator’s Updates (1703/1709)
Apple Mac OS Mojave – 10.14 (2018) = MS Windows 10 April/Oct. 2018 Updates (1803/1809)
Apple Mac OS Catalina – 10.15 (2019) = MS Windows 10 May/Nov. 2019 Updates (1903/1909)
Apple Mac OS Big Sur – 10.16 (2020) = MS Windows 10 May/Oct. 2020 Updates (2004/20H2)
Apple Mac OS Monterey – 10.17 (2021) = MS Windows 11 (aka “Sun Valley“) and Windows 10 May/Nov. 2021 Updates (21H1/21H2)

Apple Mac OS Ventura – 10.18 (2022) = MS Windows 11 Update???

– Kupitero

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