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Keep that distinction when comparing listings or reviews: the MK540 family name alone does not identify every printed key or regional arrangement. Physical mass also needs context. The support page specifies a bare mouse mass of 73.5 g without its receiver or batteries. TechFinitive reports approximately 100 g with a battery installed, without disclosing a weighing instrument or protocol. Those figures describe different conditions and should not be treated as a verified manufacturing discrepancy. The reviewer figure is an approximate physical observation, not a laboratory benchmark. 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Today's Tech Bytes says there is no macOS support, but the manufacturer datasheet separately mentions optional Logitech Options software for macOS. A software reference does not prove full device compatibility, and an omitted platform does not prove that basic input can never work. The defensible conclusion is narrower: full Mac functionality is not established by these manufacturer tables. Mac buyers should verify their required keyboard shortcuts and customisation before choosing the combo, especially if those functions are essential rather than optional. Avoid turning that uncertainty into a blanket claim that connection is impossible. 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Full Mac functionality is not established here; verify required shortcuts and customisation rather than assuming either complete support or impossible connection.","claim_ids":["mk_platforms","mk_mac_caution"],"faq_id":"faq_mac","intent":"compatibility","question":"Should Mac users choose it?","source_ids":["source_snapshot_2c949188806ac20d6d82447cff4ca1334e5ace7777fd7cc92f9120cc20c0461a","source_snapshot_0684fa9e6198d4c7ab4da8b95dd9b7b2f7c451f50982fe0b863206ca09fbf5ad","source_snapshot_210ad4c249f18748a23d29009eab267935d646e18bdbfb5047a94a82a5a6bd6e"]},{"answer":"No independent long-duration test was found. 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