How to trigger vscode intellisense using keyboard on osx?

^Space means Ctrl + Space, not Cmd + Space (which definitely triggers Spotlight).

You can customize keyboard shortcuts according to the doc.

I am using vs code on Mac and I am a CJK user. Ctrl+Space is a shortcut for switching IMEs on my Mac.

If you open the keyboard shortcut pane (just press Command + K, then followed by Command+S), then search for trigger suggest, you will find that there are actually two shortcuts for this function:

So in case Ctrl + Space is taken by other programs. You can use Option + Esc to trigger suggestions. If you are using a Windows keyboard, Option key is Alt. You can also change the keybindings for this command as suggested by @Atilla Baspinar.

From the top menu in VSCode (on MacOS) select

Code > Preferences > Keyboard Shortcuts

A list of shortcuts is displayed on code area.

Search for "Trigger Suggest". The default value is ⌃Space.

Double click and change according to your like.

I made it Ctrl+.