The clang compiler shipped with the version of Xcode for that OS X.One of the two most recent versions of macOS (currently Catalina or Big Sur).
If your host's (your computer) architecture matches the guest's (QEMU) architecture and is running Mac OS 10.10 or higher, then you could speed up execution to near native speed using this option: -accel hvf Should you want to run Qemu with KVM support on a G5, depending on your distribution, you might have to compile your own kernel with KVM support. KVM is mainly used for x86 (32 and 64 bit) emulation on x86 hosts running Linux. Some system emulations on Linux use KVM, a special emulation mode which claims to reach nearly native speed.
