OS/X version, hardware platform, and Qt version compatibility¶

OS/X 10.4¶

As target¶

• Oldest version still apparently in use as of Feb 2011: not very widespread, but at least two researchers here use it
• Appears in PPC and i386 systems
• Runs in 32-bit mode only
• Can build for it from 10.4, 10.5, 10.6
• Requires SDK /Developer/SDKs/MacOSX10.4u.SDK
• Requires -mmacosx-version-min=10.4 on 10.5+
• Requires gcc-4.0 to be requested explicitly on 10.6
• Does not support Objective-C 2.0
• Not a supported target for Qt's Cocoa builds, Qt Carbon needed

As build host¶

• Does not support Objective-C 2.0
• 10.4u SDK can build 64-bit executables of simple programs, but not GUIs

OS/X 10.5¶

As target¶

• Last version supported for PPC platforms
• Runs in 32-bit mode by default
• Can build for it from 10.5, 10.6
• Requires SDK /Developer/SDKs/MacOSX10.5.SDK
• First version to support Objective-C 2.0
• Qt Cocoa supported

As build host¶

• Builds 32-bit by default
• Can be used to do 64-bit builds

OS/X 10.6¶

As target¶

• Not supported on PPC
• Runs in 64-bit mode by default where possible
• Is not always 64-bit -- it is supported on 32-bit-only hardware such as Core Duo (first Intel Macs)