What is dyly?

Question

What is dyly?

I looked up for this and didn’t found anything similar, so I decided to delete it from my MacBook Pro and the whole system crashed without letting me do anything but to connect to Wi-Fi and see the hour interface. I tried to call Apple Support in Latin America, USA, and Canada and my call wasn’t received, they let me hanging up. So I basically couldn’t get remote help to back up my files and not loose them. Now I wonder how the whole system crashed by deleting just one “unknown file by the internet”.

It was on the folder ~/usr/ as dyly. It’s an executable and it’s related to a file called “icutz44l.dat”, that’s at least what my Activity Monitor said when I tried to stop a process I couldn’t find on the web.

I know you probably will say “you shouldn’t delete files on the hidden system folders”, but every time I used Autodesk Maya, those processes slower the system at the point I wasn’t able to even open the menu. So, I stopped the processes and Maya worked. That’s why I decided to delete that file “dyly”.

So, is there anyone who can give me a deep explanation about what is it, what does it do, why my system crashed when I deleted it, and why it interferes with Maya?

Thanks in advance.

You may consider I’m in Venezuela (there’s no authorized agencies here anymore).

MacBook Pro mid-2017 13’ - Mojave.

Macbook (2016 or later)

Posted on Dec 28, 2018 9:13 PM

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Answer 1

Barney-15E

Level 10

122,252 points

Dec 28, 2018 9:26 PM in response to alejandrovici

~/usr shouldn't be a directory. Did you mean /usr?

Also, was it dyld? That is the dynamic linker and is pretty much used all the time when any process starts.

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Answer 2

Jan 1, 2019 2:02 PM in response to Barney-15E

Yes, I meant /usr. Ok, but if it is dynamic linker, why does it slow down process of applications like Maya? I don’t get it. I usually also end CryptoTokenKit processes like ctkahp in the Activity Monitor or Terminal, because they also slow down Maya. It doesn’t have any sense. Those process shouldn’t have anything to do with Maya. Maybe dyly, but the info I found about dyly, wasn’t on the “usr” root folder, but anywhere else, that’s why I didn’t trust on that file, and when I reinstalled Mojave, that file wasn’t installed, so I hav motives to believe it was hacked. Now, from what you’re telling me, I wonder. I will need that file for example to export a video from After Effects to Adobe Media Encoder? Or how does the dynamic linker works? Which dynamic links does it makes? Thanks for the feedback Barney.

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Answer 3

Barney-15E

Level 10

122,252 points

Jan 1, 2019 2:56 PM in response to alejandrovici

First, I don't have a dyly file or any type. I was talking about dyld, the dynamic linker daemon.

The dynamic linker loads shared libraries so that programs don't have to recreate the wheel. Common Libraries can be loaded by every program without having to build that library into the app itself.

If you have a dyly executable in /usr, I don't know what it is. It's possible it was installed by a legit program, perhaps Maya.

Does Maya have an installer, or is it "standalone" program?

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Answer 4

Jan 1, 2019 3:09 PM in response to Barney-15E

Ah ok. Yes, it’s a different one. An executable called dyly. I thought it was installed by the program itself (yes, it has an installer), the problem is that is even stranger if it comes with Maya, because it causes problems to Maya and the processes that the program run, doesn’t use that file. It’s pretty weird, but is like the third time it happens to me, so I needed to ask. Because it makes crash the OS in an awful way. The only way to recover it, is reinstalling it. Thank God this time I didn’t lost my files and apps, but is tiring. Well, I’m gonna leave the post open to see if someone in the future can answer me about dyly, not dyld. But thank you! It’s good to know about that daemon too, to not get confused.

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