Generally it should be possible to convert the financial data exchange files from Quicken for Windows to a version for Mac. There is usually also a dedicated FAQ help file for this on Quicken website.
Convert Quicken financial data to Quicken Essentials for Mac financial data exchange file.
We have found 2 software records in our database eligible for .qdf to .qxf file format conversion.
Microsoft Windows software - convert qdf to qxf on Windows
A personal finance management program by Intuit
Convert from qdf file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned qdf to qxf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert qdf to qxf on OS X
Mac version of popular Quicken personal finance management software