> On Jan 10, 2020, at 6:36 AM, Gabriel Zachmann via Cocoa-dev 
> <cocoa-dev@lists.apple.com> wrote:
> 
> Steve, thanks a lot for your response!
> 
>>> 
>>> In my screensaver, I try to search the Pictures directory in the user's 
>>> home.
>>> It is OK - for now - if my app cannot access any .photoslibrary, but I'd 
>>> like to pick up
>>> any other images in ~/Pictures.
>>> 
>>> I get the path using this line of code:
>>> [NSHomeDirectory() stringByAppendingPathComponent: @"Pictures/"]
>>> 
>>> However, when I print the actual path to the system log, it says it is 
>>> accessing this path:
>>> /Users/me/Library/Containers/com.apple.ScreenSaver.Engine.legacyScreenSaver/Data/Pictures
>>> 
>>> Is this directory somehow linked to ~/Pictures ?
>>> Or how can I access the true ~/Pictures directory ?
>> 
>> That's how sandboxing works.
> 
> So, is .../Containers/.../Data/Pictures linked to ~/Pictures automatically?
        No.  The user has to give your app permission to see the contents of 
~/Pictures.
        
https://developer.apple.com/library/archive/documentation/Security/Conceptual/AppSandboxDesignGuide/AboutAppSandbox/AboutAppSandbox.html

—Rob


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