There are two ways to import a Mendeley library into EndNote.

RIS

1. Open your Mendeley library.
2. Click File > Export All > RIS - Research Information Systems (*.ris).
   
3. Save the file.
4. Open your EndNote library.
5. Click File > Import > File.
   
6. A pop-up window appears. Choose the file you just exported from Mendeley. Select "Reference Manager (RIS)" in the dropdown menu after "Import Option:". Click "Import".
   
7. Your Mendeley library is imported into your EndNote library.

EndNote XML

1. Open your Mendeley library.
2. Click File > Export All > EndNote XML - EndNote v8, X1 to X3 (*.xml).
   
3. Save the file.
4. Open your EndNote library.
5. Click File > Import > File.
   
6. A pop-up window appears. Choose the file you just exported from Mendeley. Select "EndNote Library" in the dropdown menu after "Import Option:". Click "Import".
   
7. Your Mendeley library is imported into your EndNote library.