Exit the Recovery Mode and start normally.Boot into Recovery Mode, once again (command + R) - On OS X Recovery - Apple Support.Reset the SMC again - reset the management system (SCM) controller on your Mac - Apple Support.
After the upgrade to Sierra, restart your system and reset the memory NVRAM and SMC.I wanted to post a solution that I have developed due to some erratic behaviors that I lived with macOS Sierra (no sound, slow don't boot, sluggish performance. Problems with macOS Sierra? This fix can help you. He got rid of all my macOS strangeness of the Sierra. Try this - problems with macOS Sierra? This fix can help you. I followed my internal temperatures, and nothing was out of the ordinary, to cold currently at about 140 °.Īt this point, it seems that any time that puts something on the charging system and increase the temperature internal internal components of my Mac kernel_task maxes my CPU, which brings my Mac to its knees.Īny ideas how to fix? Is this just a major bug in 10.12?
Connect my iPhone to charge the tips also my kernel_task as well. When my external screen is plugged if I'm doing anything CPU intensive (videophone, opening of Chrome, etc.) then my kernel_task gets mad again, and the only way to move is to unplug my screen. plist files but I couldn't on my Mac (trying to follow this guide, started in Safe Mode and everything then went to try and find the file and my Mac just does not have it). I have since audited equipment - everything was fine, reset the NVRAM and I tried to erase IOPlatformPluginFamily.kext. My Mac is essentially useless because kernel_task is eating all my CPU and to prevent another asks to enter the CPU. I unplugged my external screen and speakers and used my laptop for about 15 minutes, the battery, and then returned to my office and plugged my Thunderbolt, rear speakers display in and my CPU shot at 100% and never came back down.
I upgraded to macOS Sierra the day he is released and had no problems until this morning. I have a maxed out end 2013 the MacBook Pro Core i7 to 2.6 GHz, 16 GB of DDR3 RAM, 1 TB SSD, NVIDIA GeForce GT 750 M 2048 MB, Intel Iris Pro 1536 MB.Īlso, I have a DELL P2415Q Display 24 inches (3840 x 2160) using Thunderbolt, are involved through the headphone jack and use a USB for lightning to recharge my iPhone.
Once you have determined the best buffer settings, try lowering the Driver Latency slider to further reduce the overall latency of your system.MacBook Pro (15 inch, end 2013) with MacOS Sierra 10.12: kernel_task maxing out CPU with external display.If the lowest I/O Buffer Size setting you can use without audio artifacts has too much latency for you to perform comfortably, choose the next lowest I/O buffer size, then turn on the I/O Safety Buffer.If you hear unwanted audio artifacts like dropouts, pops, or glitches, choose the next highest setting until you don’t hear any audio artifacts. Click the I/O Buffer Size pop-up menu, then choose the lowest number available.Choose MainStage > Preferences, choose Audio, then click Advanced Settings.
In MainStage, load the patch or concert in which you’re experiencing the most latency.Here’s how to quickly optimize your latency settings in MainStage: This delay is called latency and is caused by buffering within your Mac. When playing a software instrument in MainStage, you might experience a slight delay between when you play a note and when you hear the sound from your speakers or headphones.