2019 MBPro server file access troubleshooting

Thanks for the reply, Chris.

I tried the permissions repair as suggested without resolving the issue. After a lot more investigation, this appears to be an unfortunate incompatibility between the Synology DSM 5.2 OS and macOS 10.14.5. I tried the same activities with a Yosemite 10.10.5 Virtual Machine and was able to read/write from//to the server without incident. I have posted a query to the Synology support forum.

I don't know whether a permissions/security setting in Mojave would resolve this or not. Any ideas along this line?

Well, it turns out, this wasn't a permanent solution. I could access the folder in question for 3 or 4 clicks on different sub-folders then the MBP would lock up hard, again requiring a power cycle to free things up. This happened on both the admin user and a test user. Some things I tried subsequently:

1. I copied the folder in question to an old MB Air without a problem. It and its contents were completely accessible.
2. I then copied it to a 2013 iMac without a problem. Again folder and contents were completely accessible.
3. Then copied the folder to a thumb drive and then mounted it on the MBP. I could access folder contents on the thumb drive without problem.
4. I ran disk utility first aid on the thumb drive without a problem.
5. Tried copying it to the MBP and thence to the NAS. Copy failed with the unhelpful error 5058.
6. Tried the recommended corrections for this error, including the deletion of the finder plist without success.
7. Then copied it to an external USB-connected HDD. Copy went ok but Time Machine backup failed until I deleted the folder in question.
8. I deleted the folder in question from the MBP and time machine backup appeared to run successfully.

So there is "something" about the folder in question or its contents the the macOS, as implemented on the 2019 MBP doesn't like. I am out of ideas on what to do to get to the bottom of this and would greatly appreciate any suggestions for further investigation.

Thanks.

John

I've been going back and forth with Synology support without a resolution of this issue. The latest Mojave update to .6 didn't help, not that I expected it to.

Since I can access the NAS via a Yosemite virtual machine, I'll rely on that and not use Mojave to access the NAS. This problem appears to be unsolvable.

Hi Jeremy,

Thanks for the suggestions. I created a test user account and was able to access the folder in question without difficulty. Then, when I went back to my main user, I was also able to access the folder without a problem(!) Don't know what the problem or fix was but it appears to be resolved. Maybe a cache somewhere...

Thanks again.