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Magnetic fields do horrible things to speakers. Fridges draw a lot of power so send out a lot of electromagnetic radiation, especially when starting up (and then a lack thereof when stopping). A similar thing will likely happen if you put your cellphone beside your laptop speakers and call it from another phone. It means that the grounding of the setups ...


The boot picker is in the boot ROM, not on any disk. No Apple partitioning tool would turn your disk from GPT to MBR, but they would put a Protective MBR on the disk so MBR-based tools will realize the disk is partitioned and not mess with it.

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