10.7 is the most up to date version of mac os.
most up to date version of mac os?
10.7
the macos version was known as ical before the release of os x mountain lion in july 2012. originally released as a free download for mac os x v10.2 on september 10, 2002, it was bundled with the operating system as ical 1.5 with the release of mac os x v10.3. ical was the first calendar application for mac os x to offer support for multiple calendars and the ability to intermittently publish/subscribe to calendars on webdav servers. version 2 of ical was released as part of mac os x v10.4, version 3 as part of mac os x v10.5, version 4 as part of mac os x v10.6, version 5 as part of mac os x v10.7, version 6 as part of os x v10.8, version 7 as part of os x v10.9, version 8 as part of os x v10.10 and os x v10.11, and version 9 as part of macos v10.12.
calendar (apple)
mac os x 10.4 tiger was succeeded by mac os x 10.5 leopard on october 26, 2007, after 30 months, making mac os 10.4 tiger the longest running version of mac os x. the last security update released for mac os x 10.4 tiger users was the 2009-005 update. the next security update, 2009-006 only included support for mac os x 10.5 leopard and mac os x 10.6 snow leopard. the latest supported version of quicktime is 7.6.4. the latest version of itunes that can run on mac os x 10.4 tiger is 9.2.1, because 10.0 only supports mac os x 10.5 leopard and later. safari 4.1.3 is the final version for mac os x 10.4 tiger as of november 18, 2010. despite not having received security updates since then, mac os x 10.4 tiger remains popular with power mac users and retrocomputing enthusiasts due to its wide software and hardware compatibility, as it is the last mac os x version to support the classic environment, a mac os 9 compatibility layer, and powerpc g3 processors.
mac os x tiger