NSScreenMBS.backingScaleFactor as Double

Msgbox str(NSScreenMBS.mainScreen.backingScaleFactor)

Returns the scale factor representing the number of backing store pixels corresponding to each linear unit in screen space on this NSScreen.
This method is provided for rare cases when the explicit scale factor is needed. Please use the NSView class's convert backing methods whenever possible.
Available in Mac OS X v10.7 and later.

For apps which are not enabled for retina support, the function returns 1. So you only see 2 here if app is Cocoa, display is retina and info.plist has the NSHighResolutionCapable key.
(Read only property)

NSScreenMBS.colorSpace as Variant

dim s as NSScreenMBS = NSScreenMBS.mainScreen
dim c as NSColorSpaceMBS = s.colorSpace
MsgBox c.localizedName

Available in Mac OS X v10.6 and later.

Value is a NSColorSpaceMBS but declared as Variant to reduce plugin interdependencies.
(Read only property)

NSScreenMBS.depth as Integer

Returns the window depth information. This value cannot be used directly. You must pass it to a function such as NSBitsPerPixelFromDepth or NSColorSpaceFromDepth to obtain a concrete value for the desired information.
(Read only property)

NSScreenMBS.deviceDescription as dictionary

Dim dic As Dictionary = NSScreenMBS.mainScreen.deviceDescription

Break // see content in debugger

A dictionary containing the attributes of the receiver's screen.
(Read only property)

NSScreenMBS.frame as NSRectMBS

Dim screens() As NSScreenMBS = NSScreenMBS.screens

// show frame for each screen
For Each Screen As NSScreenMBS In screens
  MsgBox Screen.frame.String
Next

The full screen rectangle at the current resolution. This rectangle includes any space currently occupied by the menu bar and dock.
(Read only property)

NSScreenMBS.Handle as Integer

(Read and Write property)

NSScreenMBS.localizedName as String

MessageBox NSScreenMBS.firstScreen.localizedName

Either uses on MacOS 10.15 the value Apple frameworks provides.
Or returns name from plugin, either "Main Screen" or "Screen " plus index, so second screen is "Screen 2".
(Read only property)

NSScreenMBS.userSpaceScaleFactor as Double

Msgbox str(NSScreenMBS.mainScreen.userSpaceScaleFactor)

Returns the scaling factor, measured in pixels per point, where a point is always equal to 1/72 of an inch. For example, a scaling factor of 2.0 indicates the display has a resolution 2 pixels per point or 144 pixels-per-inch.

Available in Mac OS X v10.4 and later.
(Read only property)

NSScreenMBS.visibleFrame as NSRectMBS

Dim screens() As NSScreenMBS = NSScreenMBS.screens

// shows coordinates for each screen.
For Each Screen As NSScreenMBS In screens
  MsgBox Screen.visibleFrame.String
Next

The returned rectangle is always based on the current user-interface settings and does not include the area currently occupied by the dock and menu bar. Because it is based on the current user -interface settings, the returned rectangle can change between calls and should not be cached.

Note: Even when dock hiding is enabled, the rectangle returned by this method may be smaller than the full screen. The system uses a small boundary area to determine when it should display the dock.
(Read only property)

Some examples using this property:

• /MacBase/NSScreen