[turval]

Can you link to some examples?

[xenophonf]

I can:

http://support.apple.com/en-us/HT201966

http://support.apple.com/kb/DL1378

Here's one from Lenovo:

http://support.lenovo.com/us/en/downloads/migr-62282

With suitable search terms you'll find similar updates from other OEMs.