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In OS X 10.8, for system updates that were installed without being signed into an Apple ID, how can I view the update history?

I looked in Library/Logs for an update log, and also in the Software Update for an Installed Software pane, but I don't have either.

Where can I see the updates?

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up vote 17 down vote accepted

It can be found in an easy to read format using the system information app:

System > Software > Installations

System information can be found in /Applications/Utilities/System or via Spotlight.

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/Library/Receipts/InstallHistory.plist is it, it is just an xml file which is very easy to read if you have vim or an xml editor installed. – Deesbek Oct 11 '13 at 17:18

It is not easy to read, but it appears to be up to date on my machine. You can find the Install history in: /Library/Receipts/InstallHistory.plist

Wouldn't it be nice it this were listed in the Update tab of the Mac App Store?

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Well done - I've been looking for that file and you saved me from trolling spotlight to find it. Now I might need to write a little app to parse that XML file if someone hasn't done that already. – bmike Oct 11 '13 at 18:23
@bmike, the answer that Deesbek gave looks like it is just reading that file, although the answer could be a bit clearer. – Mark Oct 11 '13 at 18:25
Yes - that appears to be a decent enough app to present the data. Wohoo! – bmike Oct 11 '13 at 18:37
most decent text editors like vim will parse the xml for you @bmike, then it is just a matter of collapsing and expanding what you need. – Deesbek Oct 11 '13 at 18:44
@Deesbek, AFAIK vim doesn't parse XML, it just displays it raw. I wouldn't be surprised it EMACS has a mode to parse the XML. – Mark Oct 11 '13 at 18:52
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