node-expose-sspi Windows authentication not working with Mac Device

[Bhagrot]

Hello Team,

we are using "node-expose-sspi": "^0.1.59" version and the library working fine on production, recently Mac device users complained about authentication, they do not get windows Authentication pop instead the API returns 401 without asking for credentials.

this library does authentication on API side which is using IIS reverse proxy to communicate client. is there limitation with Mac device or any config update is required for Mac ? I would appreciate any help.