I talked to your guys yesterday about installing correct version of Lightroom 5 which I legally owned, and your guy provided me a download link (different from Creative cloud account), but somehow it was for Windows version not for Mac version. I would very much like to download a Mac version, so please send my correct web link. By the way my s. number for Lightroom 5 up is [removed], and I also have s.number for 4 up and 3 full.
This is a public forum; please do not post your serial number!
The latest non-CC version of LR 5 is 5.7.1 and download links are available on the Adobe Updates page:
Both Mac and Win links are there.
If you are asking for a LR 5 CC link, which wouldn't require a serial number, please be more clear about that.