New answers tagged power
For iMac user without Apple's keyboard for any reason. Use this command to just turn off the display. pmset displaysleepnow You can alias it to a shorter version in your favorite shell profile like ~/.bash_profile alias displayoff="pmset displaysleepnow"
Unfortunately, there is no direct way to force OS X to use battery-power mode (here, here and here). OS X uses Intel Speedstep which changes the P-state of the processor depending on the computer's power status (AC/battery). AFAIK, the only thing you can do is set your AC mode power management settings to the same as battery mode. Using pmset, you can see ...
I believe the problem may be with the charger cord, not the computer. I had an unfortunate accident and had to replace my macbook air after only 5 months. I did not even unpack the new charger, thinking the new one would be a backup. Good thing! 6 months later I started experiencing disconnects between the computer and the power cord because the magnet ...
Most MacBook use MagSafe charging which doesn't operate on the same voltage as USB - so the vast majority of battery banks that charge anything USB won't work. There are some inverters that would power the adapter using 120 or 240 VAC but those are quite large. Only the new MacBook with USB-C connector is low power enough to charge over the new power ...
Standard USB ports can not handle the load of power that a Macbook Air/Pro draws. So no, it is not advisable even if you could find an adapter. (Note that if you have the new ultrathin Macbook—not the Air or Pro—you can use a USB-C to USB2 cable to charge it from a power bank.) You can get a special power bank (like this one) that can charge your Macbook ...
I had a similar thing happen to my old Macbook. I discharged the battery all the way down and then couldn't recharge it for about two days. When I finally could charge it, it wouldn't charge or turn on. It turned out to be the battery. You can probably get a replacement battery from Apple (if it turns out to be the battery), but I found cheaper options on ...
Your charger is not the issue as evidenced by your testing it on other MacBook Airs I've tested the charger with multiple other MacBook Airs, and the charger works fine. You have a problem with either your logic board and/or your DC Power I/O Board. You need to take it in for service.
If you can at least start the Mac up and make the battery lights flash, it's lint. Here's how you clean lint from a port: Get a toothpick. Stick it in the port. Carefully rub the inside of the port. Pull out the toothpick. Repeat.
Apple makes 3 different chargers for their MacBooks that you need to be concerned about: 45-Watt -- For MacBook Airs. 60-Watt -- For 13" MacBook Pros. 85-Watt -- For 15" and 17" MacBook Pros. You can use a higher-wattage charger than you MacBook requires, but not a lower-wattage one. Yours was an 85-watt charger. If your friend's charger was a 60-watt, ...
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