MacOS

Install telnet for MacOS

Install and run memcached service on MacOS:

Installing homebrew php extensions with PECL Setting memcached on mac for local Drupal development

brew install memcached

cp /usr/local/Cellar/memcached/1.6.6/homebrew.mxcl.memcached.plist ~/Library/LaunchAgents/

launchctl load ~/Library/LaunchAgents/homebrew.mxcl.memcached.plist
    
If it loaded you will see an output from the list command
    
        launchctl list | grep memcached
    
launchctl start homebrew.mxcl.memcached

Verify memcached service has started
    telnet localhost 11211
    (if you dont have telnet see instructions for installing it on this page)
    type quit to exit a telnet session
        
launchctl stop homebrew.mxcl.memcached
    
launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.memcached.plist

Start and Stop memcached with brew services
    brew services start memcached 
    brew services stop memcached 
 
List brew services
    brew services list

Clipboard

cmd-shift-3 takes the whole screen, saves it to the desktop (Doesn't go to the clipboard)
cmd-shift-4 lets you select an area on the screen, and saves it.

cmd-ctrl-shift-3 takes the whole screen, and copies it to clipboard.
cmd-ctrl-shift-4 allows you to select an area on screen to copy to clipboard.

Keyboard shortcut to open Activity Monitor

Press Commnad+Spacebar to get the spotlight search field
Start typing "Activity monitor"

Cut and Paste a file in Mac Finder

Click on the file you wish to cut (or move) and either 
    right click and select copy
        or
    use command+C keys 

go to the directory where you want to move the file
    hit commnad+option+v to move the file
        or
    Click on Edit menu then hit the "option" key.  Click on  "move item here" item which will appear under the Edit menu.    

SSH

Go to System Preferences->Sharing
Then select Remote Login

This will start the ssh server on port 22

To log in to mac remotely from another mac terminal   
    ssh username@hostname
    enter password for the mac computer when prompted