I have a trouble with connecting my Mi Note 3 smartphone. My old Mac book doesn’t have any chance to connect and transfer file from the smartphone and today I decided to resolve that fucking trouble.
I’ve investigated that I should download Android Transfer application which you can download from the InterNet or on the link below: https://www.android.com/filetransfer/
After installing that application you should connect your smartphone through your cable and you’ll get a possibility to transfer your file in/to your smartphone.
I’d like to add that you should start that app before transfer your files and use native application Finder.