Choose references, and mark one or more. You can also choose to download All references, but notice that not more than 2000 at a time, so if you have more than 2000 hits. Choose the first 2000 reference range: 1-2000, then the next, 2001-4000, etc.
Export - EndNote - choose format > RIS (or EndNote, but you have to Choose RIS for download from APA PsycInfo. Fields: Citation, abstract, subject headings