QUESTION :
I know that LIT files can be converted to HTML files on a Mac, but is there an actual lit file viewer for Mac analogous to MS ebook reader?
ANSWER :
I have been using Stanza to read .lit files. Check it out.
calibre is a one stop solution to all your e-book needs. It is free, open source and cross-platform in design and works well on Linux, OS X and Windows.
supported formats: CBZ, CBR, CBC, EPUB, FB2, HTML, LIT, LRF, MOBI, ODT, PDF, PRC**, PDB, PML, RB, RTF, TCR, TXT Output Formats: EPUB, FB2, OEB, LIT, LRF, MOBI, PDB, PML, RB, PDF, TCR, TXT
From here
convertlit will be able to open .lit files (which are Microsoft-format- eBook files),
or
Downloaded ABC Amber Lit Converter (Windows) and converted to PDF on my Windows computer, then transferred them over to Mac