I run Windows 7.

I notice that there's an environment variable called asl.log. What is this thing? Who puts it there?

What's the purpose of it?

I searched and found only references to MacOS and Apple System Log.
But as I said, this is a Windows7 machine from Dell. It doesn't run MacOS.

  • 4
    Hint: Apple iTunes – user1686 Nov 20 '10 at 21:00
  • 1
    Yep, I have it on an XP laptop with iTunes installed too. – Mark Hurd Sep 28 '11 at 17:12

I have it too in W7. A SYSTEM environment variable asl.log with the value Destination=file

Found this reference in the register: HKEY_CURRENT_USER\Software\Apple Inc.\ASL\filenames\asl.log value REG_SZ asl.103843_28May11.log

I am pretty sure it is an Apple thing.


On Windows 10, I deleted it, iTunes still works fine, it didn't come back.

Apparently, it's an old Apple logging thing:

http://commandlinemac.blogspot.com/2008/12/apple-system-logger.html https://developer.apple.com/documentation/os/logging

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