gtk initialization failed

[HubKing]

The computer is a Manjaro Linux with an Ivy-Bridge CPU. I cloned the repository, and then ran setupArch.sh. The output is like below. It eventually failed with "gtk initialization failed". At first I had run it over SSH, and then I tried it inside of XRDP (remote desktop), and the result was the same.

The first noticeable thing is error: target not found: python3-pip. Is this normal or an ignorable error? The second thing is those lots of unsupported features log. I know that this CPU does not support AVX2, but is it correct that all those features are really not supported? If so, is this the cause of the failure? Actually, I don't get why GTK fails for a macOS virtual machine setup. Does it really use GTK?

PS: I have been running virtual Linux desktops (Ubuntu) in KVM using VirtManager on this computer. When I need to access the virtual desktop, I use XRDP to the host Linux computer desktop (Gnome).

PS2: I tried the recommended Big Sur instead, but the result was the same.

PS3: I searched the web for the PIP error and installed just python-pip as this answer said, and the result was still the same. PIP's version is like this: pip 22.2.2 from /usr/lib/python3.10/site-packages/pip (python 3.10)

:: Synchronising package databases...
 core is up to date
 extra is up to date
 community is up to date
 multilib is up to date
warning: qemu-desktop-7.0.0-10 is up to date -- reinstalling
warning: python-3.10.5-2 is up to date -- reinstalling
error: target not found: python3-pip
Formatting 'macOS.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=68719476736 lazy_refcounts=off refcount_bits=16
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Downloading 012-51696...
Saving http://oscdn.apple.com/content/downloads/14/50/012-51696/04tp1jfy9wgiw9mits8r7jq040t5obxus6/RecoveryImage/BaseSystem.dmg to BaseSystem.dmg...
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Download complete!
Saving http://oscdn.apple.com/content/downloads/14/50/012-51696/04tp1jfy9wgiw9mits8r7jq040t5obxus6/RecoveryImage/BaseSystem.chunklist to BaseSystem.chunklist...
Note: The total download size is 2560 bytes
Download complete!

qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.fma [bit 12]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.movbe [bit 22]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi1 [bit 3]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.avx2 [bit 5]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi2 [bit 8]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xsavec [bit 1]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xgetbv1 [bit 2]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.fma [bit 12]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.movbe [bit 22]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi1 [bit 3]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.avx2 [bit 5]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi2 [bit 8]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xsavec [bit 1]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xgetbv1 [bit 2]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.fma [bit 12]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.movbe [bit 22]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi1 [bit 3]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.avx2 [bit 5]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi2 [bit 8]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xsavec [bit 1]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xgetbv1 [bit 2]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.fma [bit 12]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:ECX.movbe [bit 22]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi1 [bit 3]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.avx2 [bit 5]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.bmi2 [bit 8]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xsavec [bit 1]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.0DH:EAX.xgetbv1 [bit 2]
qxl_send_events: spice-server bug: guest stopped, ignoring
gtk initialization failed

[HubKing]

Seems like it is caused by the fundamental problem of XRDP, which has problems with showing the GUI sudo password dialogue (for some apps it works, for other apps, it does not. I had asked this about XRDP, but I think he replied that this is a problem of Linux that he cannot easily fix). I logged into Gnome as root (so that no sudo password would be needed) and then ran the script, and this time it worked and now I am seeing the macOS recovery screen.