I just upgraded my Intellij IDEA to version 14, but I have the problem that my cursor in the editor window is acting "different". It starts of in a sort of protected mode, which looks like the insert mode but it isn't, where I can't insert anything. After pressing some keys like a it changes back to normal except that sometimes it goes in a selection mode and by that I mean if I hit backspace instead of deleting the character as expected it just selects/highlights it. I find this behavior really annoying and I hope one of you can help me.
Additional Information:
Mac OS X 10.10 Yosemite
Intellij 14.0
Please ask if i can provide any additional information which might be helpful.
Disabling/Uninstalling the ideaVim plugin seemed to fix the problem for me. The plugin description hints that you can configure it via a configuration script in ~/.ideavimrc, which there may also be options to get "normal" behavior with the plugin installed but I haven't looked into that though because the plugin doesn't seems all that useful to me. I hope this helps other people to fix their issues with IntelliJ 14.
Disable Vim Emulator for Intellij.
On the top menu, go to Tools > Vim Emulator
ideaVim plug in is the problem, disable that and that misbehaviour will be gone.
Mac OS X Yosemite / IntelliJ IDEA 14 CE / us keyboard layout /
If your cursor looks like this:
Go to tools:
Turn off Vim Emulator:
Cursor should go back to normal.
Settings > IDE Settings > Editor > Appearance > Disable Use block caret
This fixed the issue for me.
Go to the Keymap section of your preferences and add your keyboard shortcut to the Toggle Insert/Override command.
It seems you have entered into insert mode. I have mac and I entered some combination of keys which somehow enabled insert mode. The use block caret was not ticked for me. I found this mentioned on JetBrains thread to get out of insert mode
In short, press on mac to get back into editing mode with the normal cursor
⌥ + ⌘ + v
来源：https://stackoverflow.com/questions/26788552/intellij-14-weird-editor-cursor-behaviour