HT202255: OS X Lion: About Auto Save and Versions
Learn about OS X Lion: About Auto Save and Versions
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All replies
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Helpful answers
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Aug 28, 2015 1:19 PM in response to oliverjby Kappy,It doesn't. Other users only have the copy you provided to them. They have no access to your computer where the other versions will be stored. Sharing a document does not constitute sharing your computer unless that is what you want to do - give anyone complete access to your machine.
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Aug 28, 2015 2:02 PM in response to Kappyby oliverj,I see, so the versioning is stored locally outside the source file itself? How does cleaning up work, since I imagine that the versioning history could get quite large, especially with graphics-heavy PDFs.
Could you point me to some tech docs that explain how their versioning mechanism works? The docs on the Apple site are pretty bad in this respect. Thx!
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Aug 28, 2015 2:25 PM in response to oliverjby Kappy,The versions are stored in a separate folder, not within the document, unless that has changed. Versioning is done based on changes rather than saving whole copies which would use a lot of disk space unnecessarily.
The only article I have is: OS X Lion- About Auto Save and Versions. You may find more by searching Google.
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Aug 28, 2015 2:46 PM in response to Kappyby oliverj,Ya, that's the document I found and it's pretty poor. I imagine there's some sort of Git-style versioning under the hood, but since PDF's often contain bitmap material, I'd be curious to see how the storing and cleanup actually works. I guess I could dive into the developer docs, I was just hoping to find a bit more specifics without having to go into a deep dive.
Additionally, security issues with local diff repositories is definitely a concern, so I'd like to understand if there is any encryption in the process. This sort of system seems like it could be a security department's nightmare with persistent historical copies that are polluted throughout the system.
Thx!
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Aug 28, 2015 3:09 PM in response to oliverjby Kappy,Security is a different topic. If you use Mavericks or Yosemite you have full disk encryption. If a company is serious about security I can't imagine this being an issue.
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Aug 28, 2015 3:24 PM in response to Kappyby oliverj,Ya, I agree, I'm more concerned with files potentially needing to be wiped in multiple places. There's got to be documentation somewhere that covers the architecture...