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I have a Mac mini running Mojave that starts a screensaver at login.

The screensaver is with password prompt, meaning that until a password is entered, it will not show the desktop. I only have the screen saver enabled; power saver is set to not go to sleep.

I'm checking the machine with a Remote Desktop service (DWService) and browsing the file system. The USB Drive I attached did not mount.

Currently I have to

  1. Enter screensaver password
  2. detach USB
  3. reattach USB

I would like to avoid this behavior, as I use folder action automation to start some process when I plug a USB storage with a magic file present on that drive.

Does anyone know how to fix this?

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  • If I hadn't already read your other question in Super User - superuser.com/questions/1516438/… - this would be even less clear what you're trying to achieve. Would you like to consolidate your questions into one, with full background information? – Tetsujin Jan 11 '20 at 16:44
  • Not sure why you post similar questions both on SU and here (the SU question would be on-topic on AD as well), but as Tetsujin said: Please consolidate and post on one site only. – nohillside Jan 11 '20 at 16:47
  • Having said that: I can't reproduce this here. After locking the screen and logging in via ssh I still see all the mounted drives (USB and Network) under /Volumes. Can you (besides consolidating) edit your question to show the steps you do and also how the mounts disappear (e.g. with screenshots)? – nohillside Jan 11 '20 at 16:48
  • Liuk. Seems you are a non native speaker or need to get some editing help. When you keep taking on more information in no order, that tends to get more down votes. I hope I captured your case correctly with my edit. – bmike Jan 11 '20 at 20:08
  • Just some more clarification...is this the screensaver that comes built in with macOS or is this some after market software? Instead of the screen saver can you try putting just the display to sleep for now? – Allan Jan 11 '20 at 20:13
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Finder actions / folder actions are blocked while the screensaver is engaged, so you will need another solution for automation if you need it running while locked.

Your stub code seems well designed to start to learn, but perhaps a different automation tech is needed for your end goals?

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  • Thanks bmike, and yes, I was a posting late in the night after a whole day trying to understand the issue: I guess it was showing! So, at least I'm thankful someone was able to read my gibberish and confirm the issue! ;-) What I found today is that not only the Folder Action is disabled, but also the recognition of my attached USB. Because if I mount my USB while the screensaver is on I cannot see it showing on my finder, nor in Disk Utility. Is it a system-wide security measure or is there any way to bypass it? – liuk Jan 12 '20 at 10:19

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