Catch TypeError in validate_mac() #2754

Job	Run time
Dependency	6s
Cache identify	4s
Shellcheck	7s
Prepare	9s
Ruff check and force	8s
Check commit	0s
Run pytest using Python ${{ matrix.python-version }}	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Run mypy	0s
Process test coverage	0s
Process test complexity	0s
	34s

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