When trying to install npm packages via “npm install”, you might encounter an error “EBADPLATFORM” 

npm ERR! notsup Unsupported platform for fsevents@1.1.3: wanted 
{"os":"darwin","arch":"any"}

This Error is indicating that you are installing the fsevents module in another OS rather than Mac, but the fsevents module only works for Mac OS.
If you did not purposefully include fsevents in your package.json, this hints at a sub-dependency.

To fix this error, you can use following parameters in the npm install command:

npm install -f --loglevel verbose

The loglevel will help you debug any further problems. “-f” will force npm to fetch remote resources even if a local copy exists on disk.

I was unable to obtain information on how this fix actually corrects the sub-dependency issue, i could guess, but that doesn’t really help anyone.

If anyone has an explanation that’s more than just guessing, please feel free to leave a comment!