install.sh fails on macOS

[brandazzle]

On MacOS Big Sur, after running all prior build-from-source steps successfully, attempting sudo ./install.sh gives
cp: /usr/bin/library-loader-gui: Operation not permitted
cp: directory /usr/share/applications does not exist
cp: /usr/share/icons/hicolor/scalable/apps/net.olback.LibraryLoader.svg: No such file or directory
This appears to be because the install.sh is designed for Linux.

[brandazzle]

I've managed to run the GUI app successfully by just running the library-loader-gui executable directly; however, it clearly cannot access its assets, since the window minimize and close buttons aren't rendering properly at all.

[olback]

The install.sh is indeed designed for Linux. I wish I could provide a better Mac experience but since I don't actually have one, it's rather difficult.

The icon issue may be fixed if you install the Adwaita icon pack (adwaita-icon-theme) via homebrew.

[olback]

Closing in favor of #67