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There are not reference sources under "Drag reference sources into the order you prefer", how can I drag them? and how to add these reference sources(dictionaries)?

Refernce Source Dictionary

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  • What exactly is the question?
    – Allan
    Apr 1 '20 at 1:03
  • @Allan why there is no reference source here, i think that's the reason why i cannot use dictionary.
    – Heisenberg
    Apr 1 '20 at 2:53
  • Yes, you should have a bunch of dictionaries listed with boxes to check before and after "wikipedia". Something has broken with your install. Apr 1 '20 at 12:34
  • How can i fix this issue @TomGewecke
    – Heisenberg
    Apr 2 '20 at 4:42
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They are supposed to be added automatically as a part of post-upgrade updating process. The upgrade itself doesn't bring everything up to date, the apps that are not part of the OS and some nonessential components are updated later.

If you are stuck with the lack of dictionaries for a prolonged time (more than a day and a couple or so of restarts), and especially if you see the degraded overall performance of your Mac, most probably the updating process is broken. I had the same picture yesterday, so I've started investigating and solved it. Maybe you have the same bug that I have had, maybe not. Still, I hope my solution would help, and to make it more general, I will describe the process, too -- so that even if your source of trouble is different, you can find your own solution.

So, first I've opened the Activity Monitor to found that trustd and nsurlsessiond are eating up the CPU. I even had to kill trustd (nsurlsessiond went down after that, too) so that I could continue to work without lots of spinballs. It looked like trustd tries to verify some app, and calls nsurlsessiond for update information and/or update itself, which, in turn, fails.

Then I've opened the Console and started searching in logs for nsurlsessiond -- and found lots of records that __mkdir failed to create a directory, "not permitted". The directory in question was /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k/0 . I went to its parent /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k and I've found in the Get Info that while _nsurlsessiond as a user had Read and Write permission, as a group it had Read only permission. Now, /private/var/folders/zz/ is not a place to mess with, but adding a permission to a known daemon and creation of a new directory are not that dangerous, so I did both: changed the permission of group _nsurlsessiond for /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k to Read and Write (to do that you must first unlock it in the right-down corner of Get Info box), and created a new folder "0" in it, making sure it also gets Read and Write privilege for _nsurlsessiond.

Then I've restarted, and let the Mac idle for a while. Soon App Store showed updates for some apps that I didn't even remember. I let them all update, updated some other apps that could not auto-update previously (such as Chrome), and again let it idle or semi-idle while I was browsing the web etc. I intentionally avoided opening the Dictionary app at that time. Today I restarted the Mac again, opened the Dictionary app, and found that all its dictionary tabs are back; when I've clicked on the German tab, it said "wait a minute for a download" and almost immediately showed me the dictionary. All the other dictionaries were back, too, after that.

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  • thanks for your answer, i followed what you said, this doesn't work for me, i don't have cpu memory concerns after checking monitor.
    – Heisenberg
    Apr 6 '20 at 22:47

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