Mac hibernate/no sleep mode


If you are a windows user; you may find difficulties to do common task what we used to do in windows such as hibernate, lid open/close action etc. here are few example for mac commands:

Find what prevents your mac machine not to sleep; following command displays programs/process running background.

pmset -g assertions

If there is a 1 or more in the “PreventSystemSeep,” then there is an app preventing your Mac from sleeping.

Change Lid open / close action.

On MacBooks, when you close the lid, it automatically goes to sleep unless it is connected to an external display. We can change this behavior; open the Terminal and type the following command:

sudo pmset -a lidwake 0

Revert above action by entering the following command:

sudo pmset -a lidwake 1

Prevent Sleep while Idle.

To prevent your Mac from going to sleep while idle, then type the following command into the Terminal:

sudo pmset powerbutton 0

Following command to revert back to normal.

sudo pmset powerbutton 1

Finally easy one using GUI.

NoSleep.

https://code.google.com/p/macosx-nosleep-extension/downloads/detail?name=NoSleep-1.3.3.dmg


Following command to sleep mac machine instantly:
pmset sleepnow

The default MacBook Pro sleep setting maintains the current session on the RAM and thus requires a small power. There is a sudo command in the terminal that can alter this method by sending the session data to the hard drive and reducing the power drain in “deep sleep” mode.

sudo pmset -a hibernatemode 25

You can switch back to the regular sleep with the command:

sudo pmset -a hibernatemode 3

Run following command to determine your current sleep mode:
pmset -g | grep hibernate

sudo pmset -a hibernatemode 25

Recover some drive space

If you are switching back to normal from mode 25; run following command to free dis space.
cd /var/vm
sudo rm sleepimage

Hibernate mode values detail explanations:

hibernatemode = 0 (binary 0000) by default on supported desktops. The system will not back memory up to persistent storage. The system must wake from the contents of memory; the system will lose context on power loss. This is, historically, plain old sleep.

hibernatemode = 3 (binary 0011) by default on supported portables. The system will store a copy of mem-ory memory ory to persistent storage (the disk), and will power memory during sleep. The system will wake from memory, unless a power loss forces it to restore from disk image.

hibernatemode = 25 (binary 0001 1001) is only settable via pmset. The system will store a copy of mem-ory memory ory to persistent storage (the disk), and will remove power to memory. The system will restore from disk image. If you want “hibernation” – slower sleeps, slower wakes, and better battery life, you should use this setting. Please note that hibernatefile may only point to a file located on the root volume.


Hibernate App.

http://www.jinx.de/SmartSleep.html (paid version; you can ignore)

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About Robiul

Robiul has 15 years of continuous successful career experience in ICT with extensive background in System Engineering, IT infrastructure design, operations and service delivery, managing IT projects / MIS functions for local and multi-national companies with in-depth knowledge of multiple operating systems as well as construct / manage small to medium size Data Center. Proven ability to design and implement medium to semi-large scale LAN/WAN/WLAN and system infrastructures. Academic qualification: Master of Science in Information Systems. Professional certifications are: MCSE, CCNA, ITIL and FoundStone Security Professional, VCP, NetAPP, CISSP etc.
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