Useful Macbook info

Commands

Press Control + Shift + power button

To lock the computer

Press Command + Shift + 4

To enable screenshot

Press .Command + Option + Esc

This will open the Force Quit Applications window.

Package installation

Method to install python3

Refer https://www.python.org/downloads/release/python-365/ and download Mac-os 64 bit installer

Tips

Method to check if VT-x status in MacBook (Needed for virtualisation)

check machdep.cpu.features via sysctl

Check for VT-x support

Deepaks-MacBook-Air:02122017 deepak$ sysctl -a | grep machdep.cpu.features | grep VMX

machdep.cpu.features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA CMOV PAT PSE36 CLFSH DS ACPI MMX FXSR SSE SSE2 SS HTT TM PBE SSE3 PCLMULQDQ DTES64 MON DSCPL VMX SMX EST TM2 SSSE3 FMA CX16 TPR PDCM SSE4.1 SSE4.2 x2APIC MOVBE POPCNT AES PCID XSAVE OSXSAVE SEGLIM64 TSCTMR AVX1.0 RDRAND F16C

If you see VMX in the output, then the CPU supports the Intel VT-x feature.

Useful link: https://apple.stackexchange.com/questions/224870/how-to-check-vt-x-status-on-macbook-pro

Get route similar to windows "route print"

#netstat -r

Routing tables

Internet:

Destination Gateway Flags Refs Use Netif Expire

default 192.168.0.1 UGSc 28 0 en0

127 localhost UCS 0 0 lo0

localhost localhost UH 1 51650 lo0

169.254 link#4 UCS 0 0 en0

192.168.0 link#4 UCS 0 0 en0

192.168.0.1/32 link#4 UCS 1 0 en0

192.168.0.1 6c:72:20:d2:d7:ad UHLWIir 29 23 en0 478

192.168.0.2/32 link#4 UCS 0 0 en0

Internet6:

Destination Gateway Flags Netif Expire

localhost localhost UHL lo0

fe80::%lo0 fe80::1%lo0 UcI lo0

fe80::1%lo0 link#1 UHLI lo0

fe80::%en0 link#4 UCI en0

To add a route to <Dest IP> via <GW IP>

#route -n add <Dest IP>/32 <GW IP>

For example,

#route -n add 1.1.1.1/32 10.10.10.10

To extract configured routes

#netstat -nr

Internet:

Destination Gateway Flags Refs Use Netif Expire

default 172.21.16.1 UGSc 205 7 en0

1.1.1.2/32 10.10.10.10 UGSc 0 0 en0

127 127.0.0.1 UCS 0 0 lo0

127.0.0.1 127.0.0.1 UH 1 660 lo0

169.254 link#4 UCS 0 0 en0

172.21.16/23 link#4 UCS 15 0 en0

172.21.16.1/32 link#4 UCS 1 0 en0

172.21.16.1 f0:1c:2d:f5:1b:41 UHLWIir 206 72 en0 580

172.21.16.15 94:b4:f:c1:ae:b2 UHLWI 0 0 en0 1169

172.21.16.74 54:79:75:b3:93:a8 UHLWI 0 0 en0 1093

Method to open multiple instances of wireshark

use 'open -n' option

Deepaks-MacBook-Air:triton deepak$ open -n /Applications/Wireshark.app

Useful link: https://osqa-ask.wireshark.org/questions/54036/open-multiple-captures-on-mac

Too many redirects error in Safari browser

I saw this error while trying to download file from google drive

Solution: Following the steps mentioned in https://support.apple.com/en-in/HT203370 has resolved my issue

Add a command to execute during terminal start

For example, adding an export command.

Update ~/.zshrc file as shown in below example

Ref: https://stackoverflow.com/questions/11530090/adding-a-new-entry-to-the-path-variable-in-zsh

View shell command history

Run echo $HISTFILE

Ref: https://superuser.com/questions/950403/bash-history-not-preserved-between-terminal-sessions-on-mac

Switch between Xcode version

It will be needed if your application needs older version of Xcode

use Xcode-select

Useful link: http://iosdevelopertips.com/xcode/xcode-select-managing-multiple-versions-of-xcode.html

Macbook charger

MacBook Air can be charged using MacBook Pro charger. Please refer https://support.apple.com/en-in/HT201700

Reference

http://www.tekrevue.com/tip/the-fastest-way-to-lock-or-sleep-your-screen-in-mac-os-x/

http://www.wikihow.com/Force-Quit-an-Application-in-Mac-OS-X