Tuesday, December 23, 2025

macos – Help with usage of bioutil (what settings can I read/write, password issue)?

I’ve read, here and a few other places, I can use bioutil -w btimeout xxxxxx to set the timeout for how long (after going to sleep) I can use the TouchID instead of having to use my password to re-login. But I can’t find anything specifying what other options I might have. The man page lists the functions, like -w, -s, or -r, but I can’t find a listing of what options use to read any other information with bioutil.

I tried bioutil -r btimeout and got the same info as I got with just bioutil -r. I don’t see any way to retrieve a list of settings. I do see a list of three items I can change, btimeout, mtimeout, and ptimeout. However, when I try to change set btimeout like the man page shows (bioutil --btimeout xxxxx)I get error messages.

Also, when I use it with sudo, I get:

Enter user's (0) password:

And when I enter my password, I get:

Error occured, err = 0x1.```

I've tried multiple times and still get the same result. I have set an admin/root password for my computer and it doesn't accept that, either. I've also tried `sudo ls` so I could enter my password for another command and it works, then I try `sudo bioutil -w btimeout xxxx`, which, under normal conditions, should work since I just ran a command under sudo, but it won't - it still asks for user's (0) password.

So, to sum up the questions/issues (not in the order presented):
 1. What password is it asking for and why doesn't it work when I just used sudo?
 2. How do I get a list of settings or values I can read with this utility?
 3. Why is it that when I used `bioutil --btimeout xxxx`, like the man page says, it won't work?
 4. What format (since the man page gives either outdated or inaccurate information) do I need to use to set my TouchID timeout?

(This came up because I have a Mac in my workshop and I used to be able to use TouchID for a day or two, what seemed like the normal 48 hour limit, to login, but in the past week or so, even though I had not updated, suddenly I can't use TouchID even within 4 hours of sliding my pointer to the corner so the screensavers come up.)

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