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Fix MBP High Kernel_Task CPU in Sierra
Just encounter a strange high cpu problem of kernel_task in Sierra on my rMBP. It means that the kernel_task process is having more than 80% CPU usage in the process monitor. At first, it seems like some software problems, especially when atom editor is opened with a super long starting time. After closing atom, it…
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Fix MX Master Mouse Lag and Freeze Caused By Stuck Thumb Button
First thought is the bluetooth problem: tried everything related but not working at all. After a few trial and inspection, it seems that the thumb button of MX Master (located at side and pushed down by the thumb finger) is stuck, causing the mouse pointer not able to move smoothly. Disabling the thumb side button…
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WinToGo 8.1 on rMBP mid 2012
This blog has detail instructions to install USB WinToGo for Mac. But things won’t go that smooth on pre-2013 rMBP. Firstly, diskpart from Windows cmd within Virtual Machine seems to have limitations, especially for Win8.1. Partitioning can work sometime but formatting will probably fail. Therefore, diskutil in Mac is the solution for disk handling. But another…
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Rescue Black Screen Fusion VM
My windows 2003 vm in vmware fusion turns into a black screen after an OSX crash. The guest system seems bootable but starts with total blackness. Fortunately safe mode works. Event log shows it’s unable to load vmx_fb.dll, which is the graphics driver of vmware tools. The paradox is that vmware tool is unable to install in safe…
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Fix 10.11.4 mysterious trackpad reset problem after reboot
Just encountered a mysterious problem after upgraded to 10.11.4 that every time MBP reboots and logins, my trackpad settings like tap-to-click are lost. It’s mysterious because during the very beginning time after login it worked as normal, but a few minutes later trackpad settings were reset automatically. It also affected the Mac AirPlay to AppleTV which…
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Fix iTunes Restore iPad2 Error 9 Problem
One of my relative’s iPad2 got stuck in the iTunes logo interface and stayed unusable for a while. Just tried to get it restored by iTunes via USB. However, it failed, always auto rebooted after progress bar showed under the Apple logo. Tried with DFU mode and restore process still failed with “Unknown Error 9”.…
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Fix 10.11 key chain prompt with deny only
Just encounter a strange problem of key chain access. When prompting for access to credentials, the dialog can only be dismissed by Deny. In the console, “Ignoring user action since the dialog has received events from an untrusted source” was logged. According to this post, 10.11.1 contains a security patch to prevent synthetic clicks on keychain…
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Fix broken miredo in El Capitan
OSX 10.11 introduced System Integrity Protection feature protecting the /usr/sbin folder, which will break existing miredo functionality to connect teredo tunnels. Steps to fix it: Copy/move upgrade-migrated miredo command line tools from /Library/SystemMigration/History/Migration-XXX/QuarantineRoot/usr/sbin/ to /usr/local/sbin Edit /Library/LaunchDaemons/miredo.plist to use new /usr/local/sbin/miredo instead of /usr/sbin/miredo Re-enable miredo in prefpane Since El Capitan also force kernel driver signing, if your…
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MX Master bluetooth pair problem with Yosemite
Just bought the latest Logitech MX Master mouse, which is quite powerful for Yosemite to natively support Mission Control and Spaces with its mouse gesture button, together with the interesting Smart Shift scrolling feature. But also encountered the problem of pairing it with my MBP Retina on Yosemite 10.10.3. One discussion thread in the logitech forum…
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Fix safari or chrome scroll lagging in Yosemite
Just found some lagging when scrolling content in Chrome/Safari, especially after a few scrolls, the web page will pause about 0.5s then leap to the target position, which is quite annoying. After a few google around and testing, the Better Touch Tool v0.9995 is found to be the culprit. After disable it, all browsing returns…