mac68k-disk 1.1
New: mac68k-disk startup <image> [<application>] [-f] shows or sets the application a startup disk opens when the Mac boots (bbHelloName in the boot blocks). With your program there, the Mac boots straight into it - handy for emulator tests and single-purpose disks; Finder restores the normal startup. info shows it as well.
Install on Debian / Ubuntu / Raspberry Pi OS (needs glibc 2.34 or newer: Debian 12, Ubuntu 22.04, Raspberry Pi OS bookworm or later):
wget https://github.com/bircher988/mac68k-disk/releases/download/v1.1/mac68k-disk_1.1_arm64.deb
sudo apt install ./mac68k-disk_1.1_arm64.deb # _amd64.deb on a PC
macOS (Homebrew): brew install bircher988/tap/mac68k-disk (or brew upgrade mac68k-disk).
From source (Linux, macOS, any Unix): make && sudo make install.