Many font formats, including the SUIT (Mac font) and TTF (TrueType font) can be converted between each other using dedicated software like FreeFontConverter. There usually should be no problems with suit to ttf conversion, but sometimes not every signs may be transferred correctly.
Convert Apple Mac OS font file to TrueType font file.
We found one software available in the database for this conversion.
On-line services software - convert suit to ttf on web
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Convert from suit file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.