Some have written about MSMoney to QM conversion in the Forum. You should be able to find the posts with a "Search" conducted at the "Quicken Personal Finance Software Forum for Macintosh" level.Also, see what is available in Qucken's "-Help & Support-" (linked from red panel above.
it is a real PITA, but it can be done. You have to use QIFs as the go-between, and not everything transfers. Expect to make several trial-and-error attempts, and a few hours reconstructing and cleaning up. Unless this is a huge file with lots of accounts/transactions, it is sometimes better to just start from scratch.