Autodesk AutoCAD should be able to export SLD files as a STEP product CAD files. Probably done via export of save function.
Convert Autodesk AutoCAD slide to ISO-10303 STEP product data.
We found one software available in the database for this conversion.
Apple macOS / Mac OS X software - convert sld to step on OS X
Mac version of popular Autodesk AutoCAD software
Convert from sld file format
|Yes, AutoCAD for Mac supports step file conversion as a target file type.||Yes||Yes||step editor||Yes||No||No||No|
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.