--Machines using CP/M is likely to use MFM, but CP/M itself has nothing to do with MFM--> machines as well as IBM PC compatibles.
The hard disk, which used a Modified Frequency Modulation (MFM) encoding, was a hit, and was later released in a 10-megabyte version, the ST-412, with which Seagate secured a contract as a major OEM supplier for the IBM XT, IBM's first personal computer to contain a hard disk.
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This was made possible as the SuperDrive now utilitized the same MFM (Modified Frequency Modulation) encoding scheme used by the IBM PC, yet still retained backward compatibility with Apple's variable-speed zoned CAV scheme and Group Code Recording encoding format, so it could continue to read Macintosh MFS, HFS and Apple II ProDOS formats on 400/800 KB disks.