Qt for macOS - Requirements
Qt requires Xcode to be installed on the system. You can get it from:
http://developer.apple.com/xcode/
Required Compiler Versions
Qt for macOS is tested and compatible with several versions of GCC (GNU Compiler Collection) and Clang (as available from Xcode). For a list of tested configurations, refer to the Reference Configuration section of the supported platforms page.
OS X on PowerPC hardware
Qt 5 does not support OS X on PowerPC.
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