[macos] macOS install script cleanup

[sharder996]

Cleaning up some old macOS packaging scripts.

[Copilot]

Pull request overview

This PR modernizes macOS packaging scripts and documentation by removing legacy packaging steps and updating launchctl usage to newer subcommands.

Changes:

• Replaced deprecated launchctl load/unload -w usage with bootstrap/bootout across macOS install/uninstall scripts and docs.
• Updated the preinstall macOS version check to use the full product version string (instead of only the major version).
• Removed the Homebrew OpenSSL rpath fixup script and its invocation from the macOS packaging flow.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packaging/macos/uninstall.sh	Uses launchctl bootout instead of deprecated unload -w during uninstall.
packaging/macos/preinstall-multipassd.sh.in	Updates macOS version detection/check logic.
packaging/macos/postinstall-multipassd.sh.in	Uses bootout/bootstrap instead of unload/load -w when installing the LaunchDaemon.
packaging/macos/postinstall-multipass.sh.in	Removes legacy cleanup and uses explicit exit 0.
packaging/macos/postinstall-multipass-gui.sh.in	Fixes Applications path and uses explicit exit 0.
packaging/macos/install-ssl-libs.sh	Deleted (previously handled OpenSSL dylib relocation/rpath rewriting).
packaging/cpack.cmake	Removes invocation of the deleted install-ssl-libs.sh.
docs/how-to-guides/troubleshoot/troubleshoot-launch-start-issues.md	Updates troubleshooting commands to modern launchctl equivalents.
docs/how-to-guides/customise-multipass/configure-where-multipass-stores-external-data.md	Updates stop/start instructions to bootout/bootstrap.
docs/how-to-guides/customise-multipass/configure-multipass-default-logging-level.md	Updates stop/start instructions to bootout/bootstrap.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.60%. Comparing base (61c8a09) to head (067b61f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4988   +/-   ##
=======================================
  Coverage   87.60%   87.60%           
=======================================
  Files         274      274           
  Lines       14649    14649           
=======================================
  Hits        12832    12832           
  Misses       1817     1817           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (1)

packaging/macos/postinstall-multipass.sh.in:8

• Paths built from the installer destination root ($3) should include a slash (and be quoted) so installs targeting a non-root volume don’t produce paths like /Volumes/MyDiskusr/local/bin. This script already uses $3/… in other macOS installer scripts.

### /usr/local/bin doesn't exist on a clean OSX install, yet it is in the default $PATH!
mkdir -p ${3}usr/local/bin

### Set up symlink to new multipass binary
ln -fsv "${3}@CPACK_PACKAGING_INSTALL_PREFIX@/bin/multipass" "${3}usr/local/bin/multipass"