This is a complete A- Z index of all Mac commands and the terminal events associated with those commands. We have compiled this list by using official sources and have explained more clearly and elaborately about each of them. We have also added two additional columns specifying whether or not the command is an inbuilt system one. The final column also displays the Mac version support for each of these commands.

IMPORTANT: If you are not an advanced user and have no knowledge on how to use the terminal commands, please do not try to experiment. These are meant for medium and advanced users ONLY.

Note: For Mac High Sierra (10.13.x), you will need to click on Allow too. Click the lock icon again to prevent any further changes. Installing the Zoom application. Visit our Download Center. Under Zoom Client for Meetings, click Download. Double click the downloaded file. It is typically saved to your Downloads folder.

Download from the Mac App Store. Additional Downloads. Get the latest beta and older versions of Xcode. To view downloads, simply sign in with your Apple ID. Command Line Tools & Older Versions of Xcode. See the latest advances in Xcode presented at WWDC and other events. Help and Support. Get step-by-step guidance. Sure, you can Option-drag any file to a new location to make a copy of it, but if you want to simplify the process and automatically copy the entire contents of one folder to another, check out this simple Terminal trick. Ditto -V /original/folder/ /new/folder/ 4. Download files outside of your browser. Share your Mac’s disk to transfer files between two computers; Change system settings via the command line; Start up your computer in safe mode; If the Recovery partition itself is damaged, boot into macOS Recovery mode over the Internet to download the most recent version of macOS and get you back up and running.

Mac Terminal Commands – A to Z

Command

InBuilt

Command Action and Event

All

alias

Yes

Creation of a Alias for current User

Yes

alloc

No

Free Memory is Listed

Yes

apropos

No

String search in What is database

NA

awk

No

Scan and overwrite Text inside file and files

NA

basename

No

Change full path name to path name

NA

bash

No

Bourne-Again Shell

NA

bg

Yes

Send to background

Yes

bind

Yes

Read line Key is displayed

Yes

bless

No

Assign Boot and start-up options

NA

break

Yes

Exit a redundant loop

Yes

builtin

Yes

Execute a built in shell command

Yes

bzip2

No

Compress and decompress a file

Yes

cal

No

The calendar is displayed

Yes

caller

Yes

Subroutine call context is returned

Yes

case

Yes

Conditional statement

Yes

cat

No

Append and Display file content

Yes

cd

Yes

Change current Directory

Yes

chflags

No

Change flags

NA

chgrp

No

Modify Group Ownership

NA

chmod

No

Change group permissions

NA

chown

No

Modify File owner and permissions

NA

chroot

No

Execute a command using another root directory

NA

cksum

No

Print and display checksum

NA

clear

No

Clear current terminal screen contents

NA

cmp

No

Simply compares two files

NA

comm

No

Line by line comparison of two sorted lines

Yes

command

Yes

Run or Execute a command

Yes

complete

Yes

Edit or modify completion of a command

Yes

continue

Yes

Resume a loop

Yes

cp

No

Copy Command

NA

cron

No

Run or Execute a prescheduled command

NA

crontab

No

Schedule command for execution after an assigned time

NA

csplit

No

Split a file into context-determined pieces

NA

curl

No

Upload or download data from a server

NA

cut

No

Cut a file into parts

Yes

date

No

Display or modify date time

Yes

dc

No

Display Desk Calculator

NA

dd

No

(Copy a file) Data Dump

NA

declare

Yes

Declare and assign attributes for a variable

Yes

defaults

No

Set visual preference options for hidden files

NA

df

No

Show unused disk space

Yes

diff

No

Show difference between two files

Yes

diff3

No

Show difference between three files

NA

dig

No

Command to lookup DNS details

NA

dirname

No

Convert full path name to path

NA

dirs

Yes

Display cached directories

Yes

diskutil

No

Disk utility command

Yes

disown

Yes

Remove a job from current session

Yes

ditto

No

Same as copy command

Yes

dot_clean

No

Remove dots and underscores from a context files

NA

drutil

No

Disk drive utility command

NA

dscacheutil

No

Flush DNS or cache

NA

dscl

No

Command-line utility for directory service

Yes

dseditgroup

No

Manage groups and users

Yes

dsenableroor

No

Command to enable root access for a terminal

NA

dsmemberutil

No

Show groups and users rights

NA

du

No

File space usage estimation

NA

echo

Yes

Display an entered message on the screen

Yes

ed

No

A text editor program

Yes

enable

Yes

Enable or disable system shell commands

Yes

env

No

Display or Modify environment variables

Yes

eval

Yes

Evaluate one or more commands or arguments

Yes

exec

Yes

Execute command

Yes

exit

Yes

Exit shell

Yes

expand

No

Expand a Tab

NA

expect

No

Pre assigned dialogue exchange for interactive programs

NA

export

Yes

Assign environment variable

Yes

expr

No

Evaluate an expression or set of expressions

Yes

fc

No

Fix command

NA

fdisk

No

Format disk command

NA

fg

Yes

Bring a job to front

Yes

file

No

Analyse file type

Yes

find

No

File search matching requested criteria

NA

fmt

No

Reformat Text in a paragraph

NA

fold

No

Wrap text to automatically adjust with working area

NA

for

Yes

Simple Loop command

Yes

fs_usage

No

File system display usage

Yes

fsactl

No

Enable or disable ACL support for File System

NA

fsck

No

Check and repair file systems

NA

ftp

No

FTP manager

NA

getfileinfo

No

Get file attributes

Yes

getopts

Yes

Parse the positional parameters

Yes

goto

No

Jump to an assigned point and then continue program execution

NA

grep

No

Search file with a certain pattern

NA

groups

No

Display a user’s group name

NA

gzip

No

Compress and decompress a file

Yes

halt

No

Shutdown and Restart the system

NA

hash

Yes

Refresh command cache and path names

Yes

hdiutil

No

Hard drive interface Utility Tool

Yes

head

No

Print first line from a text file

Yes

history

Yes

History Command

Yes

hostname

No

Display or modify System name

NA

iconv

No

Convert character set of file(s)

NA

id

No

Display user and group IDs

Yes

if

Yes

Conditional Command statement

Yes

info

No

Display help information

NA

install

No

Copy and assign attributes of a file

Yes

ipconfig

No

Configure network attributes and assign values

NA

jobs

Yes

List all currently active jobs

Yes

join

No

Join command

NA

kextfind

No

List the kernel extension

NA

kickstart

No

Configure and set Apple Remote Desktop properties

NA

kill

No

Terminate a process directly

Yes

l

No

List file in original long format

NA

last

No

Indicate last login information of a users and additional info

NA

launchctl

No

Launch daemons or agents

NA

less

No

Display output on screen accommodating data per window

NA

let

Yes

Evaluate an expression or set of expressions

Yes

lipo

No

Convert binary format

Yes

ll

No

List file in original long format, also display hidden files

Yes

ln

No

Interlink files

NA

local

Yes

Assign local variable

Yes

locate

No

Find a file or files

Yes

login

No

log-in your system

NA

logname

No

Display current users login name

NA

logout

Yes

Exit login shell

Yes

lpr

No

Print file or files

Yes

lprm

No

Remove queued print jobs

Yes

lpstat

No

Printer info and current status

Yes

ls

No

List a file information

NA

lsof

No

List currently opened files

NA

lsregister

No

Reset Launch Service database

NA

man

No

Display Help manual

Yes

mdfind

No

Spotlight search command

Yes

mdutil

No

Spotlight search command utility

Yes

mkdir

No

Create new directory

Yes

mkfifo

No

Build FIFOs

Yes

more

No

Display output data one screen at one time

NA

mount

No

Mount a file system

NA

mv

No

Cut or rename directories or files

NA

nano

No

Bring up text editor

Yes

net

No

Configure network resources

NA

netstat

No

Display network information

NA

networksetup

No

Assign network attributes

Yes

nice

No

Set command priority

NA

nohup

No

Hang-up a command

NA

ntfs.util

No

NTFS utility command

Yes

onintr

No

Control shell action

NA

open

No

Open up a file or location

NA

osacomplie

No

Command to Compile an Apple script

NA

osasdript

No

Execute an AppleScript

NA

passwd

No

Modify user password directly

Yes

paste

No

Merge lines from two or more files

Yes

pbcopy

No

Copy the data to clipboard

NA

pbpaste

No

Paste the data from Clipboard

NA

ping

No

Check a network connection

NA

pkgutil

No

Display or change Installed packages info

NA

plutil

No

Property list command utility

Yes

pmset

No

Configure Power Management settings

Yes

popd

Yes

Restore previous value of current directory

Yes

pr

No

Modify Text files to print

Yes

printenv

No

Display all environment variables

Yes

printf

Yes

Print command

Yes

ps

No

Display Process status

Yes

pushd

No

Save and change current directory

NA

pwd

Yes

Print currently Working Directory

Yes

quota

No

Display disk limitation and usage

Yes

rcp

No

Copy files across machines/systems

Yes

read

Yes

Read first line from an output file

Yes

readonly

Yes

Assign read only attribute to a file/directory

Yes

reboot

Yes

Reboot a system

Yes

return

Yes

Exit Function

Yes

rev

No

Reverse file lines

NA

rm

No

Remove file(s)

NA

rmdir

No

Remove directory(ies)

Yes

rpm

No

Bring up Remote Package Manager tool

Yes

rsync

No

Remotely copy a file

NA

say

No

Text to speech conversion

NA

screen

No

Manage Multiplex terminal and run remote shells via ssh

NA

screencapture

No

Capture the screen image

Yes

sdiff

No

Merge or modify two files

Yes

security

No

Configure security options for a system

Yes

sed

No

Stream Editor Utility

NA

select

Yes

Display list of Items

Yes

set

Yes

Set shell variable

Yes

setfile

No

Set file attributes

NA

shift

Yes

Shift positional parameters

Yes

shopt

Yes

Configure shell options

Yes

shutdown

No

Shutdown/restart Mac OS X

NA

sleep

No

Sleep after an assigned time frame

Yes

softwareupdate

No

Software Update Command

Yes

sort

No

Sort the text files

Yes

source

Yes

Execute command from file

Yes

split

No

Split files into like sized pieces

NA

stop

No

Stop a process or currently running job

NA

su

No

Substitute a user identity

Yes

sudo

No

Execute command as some other user

Yes

sum

No

Print checksum value for a file

NA

suspend

Yes

Suspend shell execution

Yes

sw_vers

No

Print Mac Operating System version

NA

system_profiler

No

Report a system configuration

Yes

tail

No

Display the last lines from a file

NA

tar

No

Archiver Utility

Yes

tcpdump

No

Network Traffic dump

NA

tee

No

Redirect multiple file output

NA

test

Yes

Conditional evaluation

Yes

textutil

No

Modify Text file formats

NA

time

No

Calculate Program Resource Usage

Yes

times

Yes

Print shell along with shell process time

Yes

top

No

Display process related information

Yes

touch

No

Change the file timestamps info

Yes

tr

No

Modify Characters or delete them

NA

traceroute

No

Display Trace Route path to assigned host name

NA

trap

Yes

Execute command when shell receives signal

Yes

tty

No

Print terminal filename on stdin

NA

type

Yes

Describe command name and type

Yes

ufs.util

No

Mount or unmount a UFS file system

NA

ulimit

Yes

Limit system resources usage

Yes

unalias

Yes

Delete an alias

Yes

unamask

No

Mask User file creation

NA

uname

No

Print System Info

Yes

unexpand

No

Space to tab converter

Yes

uniq

No

Uniquify the files

Yes

units

No

Unit scale converter command

NA

unmount

No

Unmount a mounted device

NA

unset

Yes

Remove function or variable names

Yes

until

Yes

Loop command

Yes

uptime

No

Display System Runtime information

NA

users

No

Print all username of the current session

NA

uucp

No

Unix to Unix copy command

Yes

uudecode

No

Decode a file

NA

uuencode

No

Encode a file

NA

vi

No

Visual Text Editor

Yes

wait

Yes

Wait for process completion

Yes

whatis

No

Search what is database

NA

where

No

Report all command instances

NA

while

Yes

Loop command

Yes

who

No

Print all names of the users of the current session

NA

whoami

No

Display or Print current username and info details

NA

write

No

Send a user a message

NA

xargs

No

Execute utility by passing arguments

Yes

yes

No

Print a string value until and unless interrupted by a user

NA

Foot note: N/A – Data not available.

If you feel this list lacks any particular command which has been recently added to the Mac terminal, you can improve this article by mentioning it in the comment section.

Summary: This blog offers one of the best solutions for resolving a flashing question mark (?) folder problem on Mac screen.

And while you deal with this problem, you may face data loss situation due to corruption or inaccessible media. So, we also cover along data recovery solution for Mac hard drives.

Do you know Stellar Data Recovery Professional recovers data from a non-booting Mac as well? Free download to know more.

When I turned on my MacBook Pro, a flashing folder with a question mark came on the screen. That stayed there for a few seconds, but the Mac booted later on. Is there an issue with my MacBook Pro? Any suggestions…

Yesterday, after I turned on my MacBook Air, it displayed a flashing folder with a question mark. It didn’t boot so I had to force shut down. Then on, I didn’t start the MacBook. I don’t know what’s going on. Any clues on how to fix this?

In this blog, we will help you resolve the problem of ‘flashing folder with a question mark sign’ on your MacBook or iMac. And while you deal with this problem, you may come across the possibilities of data loss due to corruption or inaccessible media. So, we also cover along data recovery solution for Mac hard drives.

Macbook Air 13 Folder Download Mountain On Command Prompt

Let’s begin with the reasons for— why your Mac is flashing a question mark folder?

Flashing folder with a question mark (?) error may occur if the Mac cannot detect its boot directory. This can happen in the following situations:

  • Mac cannot find the Startup Disk i.e. Macintosh HD
  • The macOS is corrupt

How to Repair Mac Flashing Question Mark Folder?

Following are the scenarios you would face in the ‘MacBook flashing folder question mark’ situation, along with the solutions you can use to tackle them:

Case 1: When MacBook displays the error for a few seconds but boots

Step 1: Go to Apple menu > SystemPreferences > StartupDisk.

Step 2: Click the icon of the Startup Disk that is generally named as MacintoshHD.

Step 3: Click Restart; your Mac won’t display flashing folder with question mark again

Case 2: When MacBook displays the error but does not boot.

A) Force Shutdown and Enter macOS Recovery Mode

Step 1: Press & hold the power button for a few seconds to force shut down the MacBook.

Step 2: Power on the Mac and immediately press & hold Command + R keys until Apple logo, spinning globe, or firmware password prompt appears.

a) When prompted, select a Wi-Fi network. You’ve entered into macOS recovery mode.

Step 3: When macOS Utilities appears, go to Apple menu > StartupDisk.

Step 4:Click the Startup Disk (Macintosh HD), and then click Restart.

If the Startup Disk icon is not visible in the Startup Disk window, then likely the Startup Disk is facing a problem. Try repairing it with First Aid, as follow:

B) Repair Startup Disk

Macbook Air 13 Folder Download Mountain On Command Prompt Commands

Step 1: In the macOS recovery mode, go to macOS Utilities and click DiskUtility.

Step 2: From the left pane, select the Startup Disk (MacintoshHD).

Step 3: Click the First Aid tab and then click the RepairDisk button.

Step 4: Exit DiskUtility once the repair process is over.

Step 5: Go to Apple menu > Startup Disk then select the Startup Disk (Macintosh HD) and Restart.

If the Startup Disk is still not visible after repair, then you would need to reinstall macOS to solve the ‘Flashing Folder with a Question Mark’ problem.

Also Read: 8 Best Ways to Recover a Failed Internal Mac Hard Drive

C) Recover Data from macOS

Step 1: Back up the MacBook data [critical step]

This is critically important because if you reinstall the OS without first backing up the data, it will result in data loss due to overwriting. So, back up the data present in the Startup Disk to another functional Mac (Target Disk Mode), as follows:

Step I. Connect the Mac that has flashing question mark to another Mac via Target Disk Mode.

Step II. Easily get the Stellar’s data recovery software from the below:

Step III. Install Stellar Data Recovery Professional for Mac on the working Mac.

Step IV. Launch the tool, and from the main interface, select RecoverData.

Step V. Select the type of data and the location of the flashing question mark drive.

Step VI. Click Scan after you turn on the DeepScan feature for rigorous searching.

Step VII. Click Recover, and on the dialog box, specify the save location and click Save. The ‘save’ location can be the working Mac’s internal drive if it has sufficient space or else another external drive.

For quick walkthrough on how to use the software for MacBook data backup, see the following video:

Step 2: macOS Reinstallation

After the data stored on the HD – having flashing question mark folder problem – is backed up, proceed with reinstalling macOS, as follows:

  1. In the macOS Recovery mode, go to macOS Utilities and click Reinstall macOS.
  2. Click Continue then select Macintosh HD (Note: You have already done the Mac data recovery to an external storage drive.)
  3. Erase Macintosh HD and execute the on-screen steps to reinstall macOS. Once the installation is over, Mac automatically restarts and boots from the Startup Disk.
  4. In Setup Assistant, migrate your data from the source disk (i.e. external storage/HD of the functional Mac) to the internal Mac drive.

Note: When Disk Utility does not show the Startup Disk or cannot repair it, then the storage drive has hardware problems. Contact a Mac repair service provider in this scenario.

Macbook Air 13 Folder Download Mountain On Command Prompt Windows 10

Conclusion

The article elaborated various methods to repair flashing question mark folder screen on Mac. The first case occurs when your Mac shows a flashing folder with a question mark for a few seconds. In this case, you reselect the Startup Disk from system preferences.

Macbook Air 13 Folder Download Mountain On Command Prompt Command

The second case happens when your Mac is stuck in the flashing folder with a question mark without booting. In this case, you need to enter the macOS recovery mode and reselect the Startup Disk. If it’s not visible, then try repairing it with Disk Utility.

If the Startup Disk repair fails, then you would need to reinstall macOS to overcome this problem. But, before that, it’s critical to back up the data stored on this hard drive, as reinstalling macOS will simply overwrite the existing data.

So, connect the affected Mac to a functional Mac via Target Disk Mode, install Stellar Data Recovery Professional software on this working Mac, and then run it on the affected hard drive to extract and backup all the data to a secure location. Once the data is backed up, reinstall the macOS on the drive to fix the flashing folder with a question mark issue on Mac.