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To open fzf from MacVim in a new iTerm2 window, create an executable script with the following content and add `let g:fzf_launcher = "PATH_TO_THE_SCRIPT_FILE %s"` to your Vim configuration.

# For iTerm2 version 3.0 and higher

(Added by @amacdougall)

The Applescript API for iTerm2 has changed with version 3.0. This updated script works for me:

!/bin/bash

update for iterm2 3.0+

osascript -e \

on run argv

tell application "System Events"

set old_frontmost to item 1 of (get name of processes whose frontmost is true)

end tell

tell application "iTerm2"

set myterm to (create window with default profile)

tell myterm

select

end

tell current session of myterm

write text "cd " & quoted form of (item 2 of argv)

write text "bash -c \'" & (item 1 of argv) & " && exit\'"

end tell

repeat while (exists myterm)

delay 0.1

end repeat

end tell

tell application old_frontmost

activate

end tell

end run' "$1" "$PWD"

The `tell myterm select` may be helpful when the new window opens on a monitor which does not have the main iTerm2 window. My system, running macOS Sierra, does not automatically focus the newly opened window.

Here is JavaScript (JXA) mutation (by @chew-z):

!/usr/bin/env osascript -l JavaScript

// osacompile -l JavaScript -o fzf_MacVim.scpt fzf_MacVim.js

ObjC.import('stdlib')

function run(argv) {

'use strict';

const iTerm = Application('iTerm');

const SystemEvents = Application('System Events');

const frontmost = Application.currentApplication(); // MacVim

iTerm.includeStandardAdditions = true;

const verbose = false;

var args = $.NSProcessInfo.processInfo.arguments

var argv = []

var argc = args.count

for (var i = 4; i < argc; i++) {

// skip 3-word run command at top and this file's name

// console.log($(args.objectAtIndex(i)).js)

argv.push(ObjC.unwrap(args.objectAtIndex(i)))

}

if (verbose) { console.log(argv); } // print arguments

iTerm.activate();

let win = iTerm.createWindowWithProfile('fzf');

delay(0.2);

let fzf_session = win.currentSession();

SystemEvents.keystroke('l', {using: 'control down'}); // Clear screen from artefacts

delay(0.2);

let cmd1 = "cd " + argv[1]; // cd $PWD

iTerm.write(fzf_session,{text: cmd1});

delay(0.2);

let cmd2 = argv[0] + " && exit"; // fzf command && exit

iTerm.write(fzf_session,{text: cmd2});

delay(0.2);

while (fzf_session.isProcessing()) { // wait until fzf finished

delay(0.2);

}

frontmost.activate(); // bring back MacVim

// $.exit(0);

}

You could compile script above using command ``` osacompile -l JavaScript -o fzf_MacVim.scpt fzf_MacVim.js ```

and then put inside fzf_MacVim.sh (your g:fzf_launcher). 

osascript -l JavaScript /path/to/fzf_MacVim.scpt "$1" $PWD

I recommend creating separate iTerm profile for fzf interaction. 

# For iTerm2 version 2.x

(Originally posted by @gleachkr)

To open fzf from MacVim in a new iTerm2 window, create an executable script with the following content and add `let g:fzf_launcher = "PATH_TO_THE_SCRIPT_FILE %s"` to your Vim configuration.

!/bin/bash

osascript -e \

'on run argv

tell application "System Events"

set old_frontmost to item 1 of (get name of processes whose frontmost is true)

end tell

tell application "iTerm"

activate

set myterm to (make new terminal)

tell myterm

set mysession to (make new session at the end of sessions)

tell mysession

exec command "bash"

write text "cd " & quoted form of (item 2 of argv)

write text (item 1 of argv) & " && exit"

end tell

repeat while (exists myterm)

delay 0.1

end repeat

end tell

end tell

tell application old_frontmost

activate

end tell

end run' "$1" "$PWD"

to control the size of the generated iTerm window you just need to insert the lines

set number of columns of myterm to C

set number of rows of myterm to R

for some numbers C,R after `set myterm to (make new terminal)`


	
*And for zsh**:

!/usr/local/bin/zsh

osascript -e \

'on run argv

tell application "System Events"

set old_frontmost to item 1 of (get name of processes whose frontmost is true)

end tell

tell application "iTerm"

activate

set myterm to (make new terminal)

# set number of columns of myterm to 250

# set number of rows of myterm to 30

tell myterm

set mysession to (make new session at the end of sessions)

tell mysession

exec command "env PATH=/usr/local/bin/:$PATH /usr/local/bin/zsh -f"

write text "cd " & quoted form of (item 2 of argv)

write text (item 1 of argv) & " && exit"

end tell

repeat while (exists myterm)

delay 0.1

end repeat

end tell

end tell

tell application old_frontmost

activate

end tell

end run' $1 $PWD

And put it in PATH (I've put it in `/usr/local/bin`)

Note: it doesn't work very well if you've got an instance of iTerm2 running in full screen