I'd argue the T2 chip is actually more secure than your method. Magnets can be removed. The T2 chip cannot. Not without rendering the computer unusable and the

I'd argue the T2 chip is actually more secure than your method. Magnets can be removed. The T2 chip cannot. Not without rendering the computer unusable and the data irrecoverable If someone can physically modify your laptop, you've already been hacked, T2 chip or not. if your attack model is "T2 chip is compromised" I think the more realistic attack model is "Apple enables the undocumented 'turn on mic while closed' feature that it was required to add through a national security letter that they can't talk about." And then that secret hack is either discovered (or stolen) by other government.