xcode-fullscreen-simulator.sh

#!/bin/bash

# Enables full/split-screen window modes in the running Simulator.app instance
# (original idea: https://twitter.com/stroughtonsmith/status/799664540996739073)
#
# Works by attaching with LLDB to the running Simulator.app instance and
# adding -Primary, -Auxiliary and -AllowsTiling collectionBehavior's to existing windows.
# Note that this is usually impossible due to SIP (System Integrity Protection). One
# workaround is to remove code signature from the Simulator binary.
#
# 1. Make sure Simulator.app is running
# 2. Run this
#     - Follow instructions to work around SIP (once for each Xcode update)
# 3. Notice 'Enter Full Screen' (the right one, green) button is now enabled on the Simulator window title bar
# 4. Long-press it to enter tiling mode
#     - Note that the usual way of setting up splits through Mission Control won't work for this window

path=${1:-"/Applications/Xcode.app/Contents/Developer/Applications/Simulator.app/Contents/MacOS/Simulator"}

[ -f $path ] || {
	>&2 echo "Invalid simulator path: $path"
	exit 1
}

codesign --display "$path" 2>/dev/null && {

	>&2 cat <<-EOF
	Simulator binary is code-signed. LLDB won't be able to attach due to System Integrity Protection.
	Close Simulator and remove code signature with:
	codesign --remove-signature "$path"
	EOF

	exit 2
}

lldb \
	--attach-name Simulator \
	--batch \
	--one-line "expr ((NSWindow *)[(NSArray *)[[NSApplication sharedApplication] windows] setValue:@(1<<7|1<<8|1<<11) forKey:@\"collectionBehavior\"]);"