Remove edges and scroll from PDFView

Question

I want to display a PDF in my macOS app using PDFKit. Therefore I've added a simple PDFView in IB. I want each slide of the PDF to be displayed separately and non intractable, just like an image. The only thing that should be possible is to walk through the slides with the arrow keys. I set it up with the following code:

@IBOutlet weak var pdfView: PDFView!
override func viewDidLoad() {
    super.viewDidLoad()

    if let path = Bundle.main.path(forResource: "slidedemo", ofType: "pdf") {
        let url = URL(fileURLWithPath: path)
        if let pdfDocument = PDFDocument(url: url) {
            pdfView.displayMode = .singlePage
            pdfView.document = pdfDocument
            pdfView.pageShadowsEnabled = false

            guard let pageBox = pdfView.currentPage?.bounds(for: .mediaBox) else { return }
            pdfView.frame = pageBox
        }
    }
}

I get the following from my app

The problem is that there is still the gray border and I am also able to scroll. I've tried the following to fix both problems, but none of them worked.

let scrollView = pdfView.subviews[0] as! NSScrollView
let clipView = pdfView.subviews[0].subviews[1] as! NSClipView

// To remove scrolling
scrollView.hasHorizontalScroller = false
scrollView.hasVerticalScroller = false
scrollView.hasHorizontalRuler = false
scrollView.hasVerticalRuler = false
scrollView.horizontalScroller = nil
scrollView.verticalScroller = nil

// To remove the border
scrollView.borderType = .noBorder
clipView.contentInsets = NSEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
clipView.automaticallyAdjustsContentInsets = false