Having issues with background in dmg

[rasmusvedel]

Hi all.

I haven't been able to google my way out of this one, so I hope you can help me.
I'm trying to create a .dmg for class, that includes Wine and an .app-file created with winebottler. I put both in the folder, along with a applications-shortcut. I then put a nice homemade background in the folder (and hid the file using Terminal) and this is where it goes wrong for me.
Whenever I open the .dmg on SnowLeopard or Leopard the background works just fine, but when I open it on Lion the background just displays as a tiny icon in the upper left corner.

Does anyone know why it won't display right in Lion? And is there a fix for this?
I'd rather fix it on my own SL-mac than use my mate's that run Lion, as I'd rather avoid using Terminal on his machine.

 

[JoZ_CaVaLLo]

I got exactly the same problem...

I was using a png image and well... after 3 hours of googling and headbraking I found the problem: Lion does not like png format as dmg background.

I changed to a jpg image and all is now working good...

Don't know why they decided to change... I find png a better format then jpg...

 

[rasmusvedel]

But my image WAS (and is) a JPEG-file so that shouldn't really be the issue here :/ Maybe I should try with a different format, though.

 

[vansmith]

PNGs work fine - I use it here to make backgrounds and they work without fault. How are you hiding the file? Which picture are you using (can we test it)?

 

[JoZ_CaVaLLo]

it's a just a normal png picture... I use tu build my dmg with a script, But I could reproduce this issue manually.

I simply tryed to build an empty dmg, I created a ".background" directory and inside it I saved a png downloaded from Internet (http://sclp.ch/images/stories/immagini/copertina-web.png)... Then I opened the view option and I set the background image dragging the image I just saved.

The result is exactly what's described in rasmusvedel 1st post...

Doing exactly the same procedure with a .jpg file, the background shows well.

I have a mac mini 2.26 Ghz Intel core 2, 2Gb 1067 Mhz and MacOSX 10.7.2 ...

Well... It's a normal PNG downloaded from Internet.

I could reproduce rasmusvedel 1st post behaviour proceeding by hand:

Created an empty dmg file with "Disk Utility". Opened it and created a directory called ".background". Inside it I saved this image: http://sclp.ch/images/stories/immagini/copertina-web.png.

Then I right click in the root of my mounted dmg and clicked "Show View options" (dunno if in english is written like that). Endly, I dragged my saved image in the option view popup.

That's all!

I have a MacMini 2.26 Ghz Intel Core 2, 2Gb, MacOS 10.7.2!!!

In attachment I provided the results using png and jpg...