Macs that have 10.4.3 or earlier can't upgrade past 10.5.8. If you are installing on a hard drive for the first time an operating system, remember to read this tip on formatting: To determine if that repair is necessary, post to the forum, and someone will be able to help you to find out which repairs might be necessary. Finally, you may need to use the Startup Manager to boot the operating system when the 'C' key doesn't work in order to get the installer to work or repair the disk before installation if the initial attempt to install fails. Read the info below to ensure you are compatible. Shut down, and disconnect any peripherals before continuing with the installation. See this tip to determine if you may want to consider it.īe sure to backup your data first at least twice before installing any operating system. The Macs on this tip explain which do:Īdditionally, those interested in updating to 10.4 may also benefit from 10.3 as well. Mac OS X 10.2 (Jaguar) or later require the correct firmware be installed. There are some Macs that came with 10.4 that can install up to 10.11. Mac OS X Sierra, which was released Septemis the first Mac OS X not compatible with any Macs running TIger. Mac OS X server questions more often are best answered by participants of the Server forums, as the limitations of Mac OS X Server can frequently differ. Note this tip, and the related tips from Mac OS X 10.3 to 10.11 refer to Mac OS X Client. When determining which operating system you meet the requirements for, see this tip on Mac model and age: On PowerPC Macs 10.4.11 is the end of Classic's compatibility), 10.5 Leopard, 10.6 Snow Leopard, 10.7 Lion, 10.8 Mountain Lion and 10.9 Mavericks, 10.10 Yosemite, 10.11 El Capitan. Tips on 10.2 Jaguar, 10.3 Panther, 10.4 Tiger (10.4.4 is the beginning for some Intel Macs.

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