OverlayWindowMBS can no longer be used on 64bit macOS.

I used it to make a Window transparent, which has a picture on it, a progressbar and a label.

I see that I can use OverlayMBS now and somehow mimic the behaviour of controls by painting myself, but I have hoped to find a solution which works more like the old (now obsolete) solution: use a window, drop some controls on it, make the window transparent.

Are there declares to achieve this?

Like NSPopoverMBS?

vcTask = new NSViewControllerMBS
vcTask.view = CCPrivacyShort.NSViewMBS

pvrTask = new NSPopoverMBS
pvrTask.animates = true
pvrTask.contentViewController = vcTask
pvrTask.behavior = pvrTask.NSPopoverBehaviorTransient

dim v as NSViewMBS = CocoaControlMBS1.View
dim r as NSRectMBS = NSMakeRectMBS(0, 0, 500, 500)

pvrTask.showRelativeToRect(r, v, pvrTask.MinXEdge)

No .. I am using NSPopoverMBS somewhere else, but here I have hoped for something which simply makes a plain box window transparent and leaving the controls on it opaque.

OK, for macOS I found this code which works for me:

Const Cocoa = "Cocoa"
Declare Sub setOpaque Lib Cocoa selector "setOpaque:" (id As Integer, b As Boolean)
Declare Function NSClassFromString Lib Cocoa (aClassName As CFStringRef) As Ptr
Declare Function clearColor Lib Cocoa selector "clearColor" (NSColorClass As Ptr) As Ptr
Declare Sub setBackgroundColor Lib Cocoa selector "setBackgroundColor:" (w As Integer, c As Ptr)

//allow for transparency by setting opaqueness false
setOpaque(Self.Handle, False)

//set the background completely transparent
setBackgroundColor(self.Handle, clearColor(NSClassFromString("NSColor")))

kudos to Will Shank
https://forum.xojo.com/18739-make-sheet-window-transparent/p1#p157078

This one?

'make transparent
dim t As integer = self.MakeTransparentMBS

self.HasNoTitleBarMBS = true
self.HasBorderMBS = true

'make the pic for the background
dim Pic as Picture 
if IsDarkMode then
Pic = mailbox_name_change_dm
else
Pic = mailbox_name_change
end if
dim Mask as Picture = mailbox_name_change_mask
WindowPic = CGCreateImageMBS(Pic, Mask)

self.Height = mailbox_name_change.Height
self.Width = mailbox_name_change.Width
CLabel.Invalidate 'otherwise label will not show

Needs a pic with a mask, though.

You can decide wether OverlayMBS helps you.
Or a normal Xojo window made transparent.