Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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System is going to sleep

Having the same problem - this is my second replacement new machine. I think it's a design fault rather than a machine fault...will try AppleCare/Genius but they've closed the biggest store and so hard to get anyone to talk to. It's crap, basically. Not impressed with Apple - and I've been using their machines for 5 years!

Update (09/05/2015)

And Dan - it's the SAME problem. Tilting is the only thing that fixes it. It went away for a while with my old machine, but as this machine is basically a clone of that one, obviously my fixes didn't last for some reason.

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OK, lets try this. Open your Utilities folder, launch Terminal. When the command line appears, type sudo pmset -g and press Return. ype in the administrator password when prompted and hit Return. This command queries the computer for the current setting of the Sudden Motion Sensor. The default setting is "1" (turned on). If the sensor is off the setting will be "0". Now run this: sudo pmset -a sms 0 into Terminal and pressing Return Type sudo pmset -g command to be sure that the setting returns as "0". This will turn off the Sudden Motion Sensor. See if that fixes things. Here's the Apple T/N I'm referencing: Mac notebooks: About the Sudden Motion Sensor



But I can't see Sudden Motion Sensor there - both machines were SSD?

Active Profiles:

Battery Power -1

AC Power -1*

Currently in use:

standbydelay 10800

standby 1

womp 1

halfdim 1

hibernatefile /var/vm/sleepimage

darkwakes 0

gpuswitch 2

networkoversleep 0

disksleep 10

sleep 0

autopoweroffdelay 14400

hibernatemode 3

autopoweroff 1

ttyskeepawake 1

displaysleep 0

acwake 0

lidwake 1

So if the Sudden Motion Sensor is activated, it shouldn't be for a SSD machine. But can't see it on the list...


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@DJNoNo Ulysses - So you replaced the HD out for a SSD. Then I would look at the SATA cable as being a problem. The HD and the SSD are slightly different sizes (depending on who's you used) So the mounting screws are not quite at the same position so the SSD drive rides low putting pressure on the cable. As to the SMS I typically disable it when I have a SSD only system as unlike a HD it doesn't get motion sickness ;-} Give it a try and lets see what happens.

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