Use Software Update to keep your Mac computer up-to-date with all the latest security. It is crucial that you keep your operating system current to protect your. All University Mac users are strongly advised to upgrade from OS X Yosemite. If you are currently running OS X El Capitan (10.11.x) or macOS Sierra (10.12.x). The and, released in 1984 The family of Macintosh operating systems developed by includes the -based it has designed for use with its series of since 1984, as well as the related it once created for compatible systems. In 1984, Apple debuted the operating system that is now known as the with its release of the. The system, rebranded 'Mac OS' in 1996, was preinstalled on every Macintosh until 2002 and offered on for a short time in the 1990s. Noted for its ease of use, it was also criticized for its lack of modern technologies compared to its competitors. The current Mac operating system is, originally named 'Mac OS X' until 2012 and then 'OS X' until 2016. Developed between 1997 and 2001 after Apple's purchase of, Mac OS X brought an entirely new architecture based on, a system, that eliminated many of the technical challenges that the classic Mac OS faced. The current macOS is preinstalled with every Mac and is updated annually. It is the basis of Apple's current system software for its other devices,,,. Prior to the introduction of Mac OS X, Apple experimented with several other concepts, releasing different products designed to bring the Macintosh interface or applications to systems or vice versa,,,. Apple's effort to expand upon and develop a replacement for its classic Mac OS in the 1990s led to a few cancelled projects,,,. Although they have different architectures, the Macintosh operating systems share a common set of principles, including a across the top of the screen; the, featuring a that represents and using and relates concepts like and to real-world objects like and a; and overlapping for. Released in 1999 The is the original Macintosh operating system that was introduced in 1984 alongside the and remained in primary use on Macs through 2001. Apple released the on January 24, 1984; its was partially based on the and the computer, which former Apple CEO previewed. It was originally named 'System Software', or simply 'System'; Apple rebranded it as 'Mac OS' in 1996 due in part to its program that ended a year later. Classic Mac OS is characterized by its design. Initial versions of the System Software run one application at a time. System 5 introduced. System 7 supports and, allowing larger programs. ![]() ![]() Later updates to the System 7 enable the transition to the architecture. The system was considered, but its architectural limitations are notably criticed, such as limited, lack of and, and susceptibility to conflicts among. Releases [ ] Nine major versions of the classic Mac OS were released. Install heart of vegas. The name 'Classic' that now signifies the system as a whole is a reference to that helped ease the transition to. • – 'System 1', released in 1984 • – released between 1985 and 1987 • – released in 1987 • – released in 1988 • – released in 1991 • – released in 1997 • – final major version, released in 1999 Mac OS X / OS X / macOS [ ]. Released in 2018 (originally named 'Mac OS X' until 2012 and then 'OS X' until 2016) is the current Mac operating system that officially succeeded the classic Mac OS in 2001.
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