Updating from panther to leopard
Mac OS X 10.5 Leopard was released as a Universal binary, meaning the installer disc supported both Intel and Power PC processors.In 2009, Apple released Mac OS X 10.6 Snow Leopard, which ran exclusively on Intel-based Macs.
Beginning with Mac OS X 10.7 Lion, the server functions were made available as a separate package on the Mac App Store.An initial, early version of the system, Mac OS X Server 1.0, was released in 1999.The first desktop version, Mac OS X 10.0, followed in March 2001.In 2011, Apple released Mac OS X 10.7 Lion, which no longer supported 32-bit Intel processors and also did not include Rosetta.All versions of the system released since then run exclusively on 64-bit Intel CPUs and do not support Power PC applications.To check for Mac software updates, open the App Store app on your Mac.
Click Updates in the App Store toolbar, then use the Update buttons to download and install any updates listed.
Releases of Mac OS X from 1999 to 2005 can run only on the Power PC-based Macs from the time period.
After Apple announced that they were switching to Intel CPUs from 2006 onwards, a separate version of Mac OS X 10.4 Tiger was made and distributed exclusively with early Intel-based Macs; it included an emulator known as Rosetta, which allowed users to run most Power PC applications on Intel-based Macs.
As of mac OS Sierra: Arabic, Catalan, Croatian, Chinese (Simplified), Chinese (Traditional), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian, Polish, Portuguese (Brazil), Portuguese (Portugal), Romanian, Russian, Slovak, Spanish (Mexico), Spanish (Spain), Swedish, Thai, Turkish, Ukrainian, Vietnamese previously Mac OS X and later OS X) is the current series of Unix-based graphical operating systems developed and marketed by Apple Inc.
designed to run on Apple's Macintosh computers ("Macs"). Within the market of desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS after Microsoft Windows.
mac OS is based on technologies developed at Ne XT between 19, when Apple acquired the company.