Why does the Vim that comes with CentOS have auto-completion, but the one that comes with Mac doesn't?

As mentioned, I was looking at some CentOS help and found that its own Vim has an auto-completion function by default, which is what comes out of Ctrl+x, then Ctrl+o.
However, the Vim that comes with Mac does not come with it. I modified some other configurations of Vim under Mac, such as turning on code highlighting, but I don’t know how to do this automatic completion. I also went to CentOS’s /etc/vimrc and /usr I went to /share/vim and looked at it, but I didn’t understand the meaning of the things in the folder under vim. In theory, if the code completion is a plug-in, then I can see it loaded in /etc/vimrc, but it doesn’t.
If it’s not a plug-in, then why doesn’t Vim come with Mac?

I hope the seniors will give you some advice, thank you.

I know, there is a prompt on Mac that ‘omnifunc’ is not set. After checking, this default plug-in seems to be called Omni completion, which is implemented using the things in the autoload directory under the Vim7x directory, but I don’t know how to set it up

Update:

Okay, I solved it myself.

Reply content:

As mentioned, I was looking at some CentOS help and found that its own Vim has an auto-completion function by default, which is what comes out of Ctrl+x, then Ctrl+o.
However, the Vim that comes with Mac does not come with it. I modified some other configurations of Vim under Mac, such as turning on code highlighting, but I don’t know how to do this automatic completion. I also went to CentOS’s /etc/vimrc and /usr I went to /share/vim and looked at it, but I didn’t understand the meaning of the things in the folder under vim. In theory, if the code completion is a plug-in, then I can see it loaded in /etc/vimrc, but it doesn’t.
If it’s not a plug-in, then why doesn’t Vim come with Mac?

I hope the seniors will give you some advice, thank you.

I know, there is a prompt on Mac that ‘omnifunc’ is not set. After checking, this default plug-in seems to be called Omni completion, which is implemented using the things in the autoload directory under the Vim7x directory, but I don’t know how to set it up

Update:

Okay, I solved it myself.

vim --version

You are talking about super tag, that completion is not very smart, you can try the ycm plug-in which is very useful

Amway a project to make Vim more efficient

:scriptnames See the difference in scripts used by the two platforms.