MacBook Pro with shot battery, possible to prevent CPU throttling? I have a late-2013 MacBook Pro 15" which still has the original battery. It's at 1,144 charging cycles, and a few days ago the battery health was at about 50%, though since then it plunged to 4%.

The output of pmset -g batt:

Now drawing from 'AC Power'
 -InternalBattery-0 (id=xxxxxxx)    100%; charged; 0:00 remaining (Poor/Good)
    failure: "Permanent Battery Failure" present: true


(Just yesterday, the output was the same except for failure: "Fuse Blown".)

The output from System Information:

Battery Information:

  Model Information:
  Serial Number:    [redacted]
  Manufacturer: SMP
  Device Name:  bq20z451
  Pack Lot Code:    0
  PCB Lot Code: 0
  Firmware Version: 702
  Hardware Revision:    1
  Cell Revision:    1206
  Charge Information:
  Charge Remaining (mAh):   308
  Fully Charged:    Yes
  Charging: No
  Full Charge Capacity (mAh):   319
  Health Information:
  Cycle Count:  1144
  Condition:    Replace Now
  Battery Installed:    Yes
  Amperage (mA):    0
  Voltage (mV): 11090


The battery/power icon on the menu bar also indicates Condition: Replace Now.

According to a series of other posts (1, 2, 3, 4, 5), when the battery is detected as dead or removed, the CPU is throttled to its slowest possible speed. This is what happened to me two days ago: after a restart (due to taking out the power adapter a few seconds before closing the lid), the computer was running very very slowly and iStat Menus was always showing a CPU clock speed of 800 MHz.

Now, I understand the battery is shot and needs replacing, and I have ordered a new one, but it won't arrive overnight. I need to keep using the laptop in the meanwhile as it is the only computer I have. It's really painful to work with the CPU permanently throttled to 800 MHz, and I'm looking for a temporary fix.

As I understood from other answers, this might be impossible, but funnily enough, I was fiddling around with this yesterday, and at some point, the computer suddenly felt snappy again (this happened at about the same time I was using pmset to change hibernatemode from 3 to 25, but it's probably not related). Checking iStat Menus, the CPU was no longer being throttled. This is exactly what I needed to hold out for the period until the battery arrives.

Unfortunately, this morning the laptop rebooted again. This is despite the fact that I closed the lid on the computer, waited until the fans stopped, and only then took out the power adapter, but still, when I connected the power adapter again and opened the lid, it had rebooted. Now the CPU is stuck at 800 MHz again and the computer is again unusable.

My question is: since it came out of throttling once (although I'm not sure what happened, or what I did, that was responsible), is there anything I can do to make it come out of throttling again?
Please note that this can damage your device.. you've been warned. Continue at your own risk

In short, IOPlatformPlugin is power management, CPU scaling, idle frequency (and others). How much the following helps is arguable.


Disable SIP in recovery (CMD+R on boot), open terminal (CMD+3 i
think), 
csrutil disable 
Reboot into MacOS, move
/System/Library/Extensions/IOPlatformPlugin.kext to / or somewhere
else 
sudo mv /System/Library/Extensions/IOPlatformPlugin.kext /
(terminal) 
Rebuild cache sudo kextcache -i /, reboot
Re-enable SIP in recovery csrutil enable