macOS Sierra: papers protected?
Since upgrading to macOS Sierra public beta, every time I open a paper from my Zotero library in Preview and try to edit it (e.g. Highlight some text) I get a message (from Preview) that “The original document can’t be changed, so a duplicate with your changes has been created.”. I have also reported this to Apple since it is probably due to a change in the OS?

Upgrade Storage
https://www.zotero.org/support/zotero_data
-rw-r--r--@ 1 christian staff ...which is the same as other PDFs that I can edit. It's located at
~/Library/Application Support/Zotero/Profiles/p4w1twjt.default/zotero/storage/C2ZFSRTTThe enclosing folders up to `p4w1twjt.default` are
drwx------ <n> christian staffthendrwxr-xr-x <n> christian staffFrom what I know this should be ok, but I am not familiar enough to tell for sure?
$ xattr -l O\'Brien....pdfcom.apple.quarantine: 0082;57904424;Preview;
And yes editable files also have the '@'.
We're going to have Zotero 5.0 use ~/Zotero by default for new installations, and we'll also have it migrate existing data directories out of ~/Library/Application Support to address this (though I'm not sure if that part will happen for 5.0 Final).
http://daringfireball.net/linked/2016/09/20/dropbox-macos-security
http://applehelpwriter.com/2016/09/20/dropbox-hack-blocked-by-apple-in-sierra/
and
https://forums.developer.apple.com/thread/62838
Apple's documentation on this hasn't been updated since Sierra's release:
https://support.apple.com/en-us/HT204899
https://developer.apple.com/library/content/documentation/Security/Conceptual/System_Integrity_Protection_Guide/FileSystemProtections/FileSystemProtections.html
If I am reading correctly, the following provides a fix until Zotero 5.0: (quoting from Dan above)
"the easiest option is probably just to move your Zotero data directory out of ~/Library and into ~/Zotero or similar."
Please confirm this is all I need to do and if so, kindly give me a little more step by step....having trouble understanding exactly what to do.
Erressler
In preferences, you can click a button to take you to your library folder, ~/zotero. Just move this out of the ~/library path. I put it elsewhere along side my /Documents and /Applications in my root user directory.
Second, this apparently seems simple. However, step one says go to preferences and click on the library folder. When I go to preferences under the apple icon, under Safari, and under Zotero, and I do not see a "library folder". As such, I cannot get past step one. Challenged here in Peachtree Corners.
https://www.zotero.org/support/preferences
1. (Disable automatic sync in the sync tab of the preferences then...) Go to show folder, which opens the data directory in Finder. Then close Zotero and move the entire "zotero" folder (in Finder) to the new location.
2. Restart Zotero. You'll see an empty library. Now again under files and folders, use the custom location button and browse to the new location of the zotero folder. (You'll need to again restart Zotero and you should re-enable auto-sync)
Update: Had to relocate and then restart...everything OK now! Thank you.