I see an option to Sleep on my Mac mini but not hibernate. Does Mac support hibernation? I am on Leopard. Chealion AngryHacker AngryHacker 7, 55 55 gold badges silver badges bronze badges.
Release Notes - Mac
SmartSleep was still free when I wrote this in To check the current setup: pmset -g grep hibernatemode According to Macworld's old article the following applies, but be sure to read Lauri's answer that suggests that nowadays only 0, 3 and 25 should be used instead : 0 — Old style sleep mode, with RAM powered on while sleeping, safe sleep disabled, and super-fast wake. In the event of total power loss, the system enters hibernation mode automatically. And the same numbers can be used to change the sleep mode setting: sudo pmset -a hibernatemode 1.
Arjan Arjan Maybe someone else will find it useful too ;-! Contact at oligofren. Create an AppleScript that simply invokes this script. Please make a systray version.
Upgrade to macOS Catalina.
Hi, thanks for the comments. Unfortunately, the newer MacBook Pro I got in has way better standby performance than my previous mac, and keeps its battery life much better. So there's unfortunately little insentive for me to go ahead and learn Cocoa for making a systray version anymore. I'll remove that sentence now. This is very interesting, how does it work? Does shutdown -s now not take effect immediately? I haven't owned a Mac in a couple of years, so I can't paste any screenshots The pmset man page also recommends using 25 instead of 1.
Some laptops now enter hibernation standby mode after about an hour of normal sleep if: Power Nap is not enabled so not by default The computer is on battery power The computer is not connected to USB devices or external displays and not paired with Bluetooth devices Laptops, Mac minis and iMacs use about 0. Lri Lri And for OS X Lion this works better for Hibernation sudo pmset -a hibernationmode 25 than sudo pmset -a hibernationmode 1 as hibernationmode 1 can cause crashes for some reason. Willem Willem 1 1 gold badge 5 5 silver badges 12 12 bronze badges. What exactly does 25 stand for?
Those three bits all tell your computer different things.
Bit 0 tells your computer to activate hibernation which means saving memory to disk before shutting down. Bit 3 tells your computer to clean out the memory of old junk before saving it to disk to make it have to save less stuff to disk.get link
Mac Bluetooth Issues - Fixes And Troubleshooting Steps
Bit 4 tells your computer to be more aggressive while cleaning out the memory allowing it to save even less stuff to disk. For example: pmset -a hibernatemode 25 force Will change the hibernate mode to represent a traditional hibernate i. Using the force option avoids the need to save and restore current hibernatemode settings. Update 4: with the two Thunderbay units in question on the iMac 5K and under heavy load, seeing no issues. I suspect Mac Pro hardware issue. Update 8 April I cannot reproduce the issue on an iMac 5K after two hours. Same two Thunderbay units, but different cable.
Unplugged that cable from iMac 5K, plugged into Mac Pro, replacing prior cable. Rebooted with the two Thunderbay units on the different cable, now running same procedures to see if problem recurs. Time will tell over some more days. But if that were the case, how does a system go bad over time? What a mess. My information is that OS X does this regularly. Clearly something goes awry. Here are eight drives going down in two daisy-chained Thunderbay units on a Mac Pro.
Anyway, ran into a big problem right away while transferring data from my RAID volumes. Once mounted, they would abruptly hot disconnect, damage my data, physically damaged one of my drives, and crash the computer.
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Not good. These were stored previously inside the Mac Pro, connected to the internal bus and always functioned perfectly. Meat of the story: so finally figured out a solution to this unnerving and debilitating problem and I would like to pass along this tip as I do not seem to find it on your site previously.
Apparently, Power Nap is now what controls the computer sleep and may also introduce other variations in the way internal and external hardware operates with OS X and the computer. His solution was to keep the Power Nap box unchecked it installs as checked by default and may periodically switch back on its own after further system installs and he still never conclusively resolved whether this was the problem, but my findings are fairly confident this is the cause.
As long as external drives are connected via ThunderBolt and mounted, this Power Nap setting must always be unchecked. Please keep up the great work, your information is invaluable and a must have reference for so may topics not covered anywhere else. But then while searching around the internet I read in your site that newer Macs have loose thunderbolt ports.
So I put tape around the Thunderbolt cables I use and boom! Never had any single disconnect since then. Thanks, this great tip also solved my problem. That printer had one job in queue and kept like you said my mac from going into sleep mode. Bruno, you rock my good sir. I simply deleted a pending printing job and my computer went to sleep like a baby. Not going to sleep neither automatically nor the forced sleep made me crazy — I even updated to Sierra ;- Kept me busy way too long to find the reason! Checked all printers and there it was: an old printing job for a switched off printer waiting to replace one ink tank -therefore not in use.
Restarts when put to sleep
Deleted that job and used the forced sleep and the Mac mini actually went to sleep right away. I had this problem so many times on different Macs in the past and never found out what actually resolved the problem. I have to recycle speakable items.
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