The core part of an operating system.

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30 views

iTerm2 cannot be opened even after SMC and PRAM resets

I got a gray screen due to "A kext releasing a(n) AppleHDAEngineOutput has corrupted the registry." Once the computer restarted, I cannot open iTerm2 anymore. A 1-lined terminal shows up without the ...
2
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1answer
78 views

Kernel Panic (?) on new 2014 MBP

I bought a new 2014 macbook pro two weeks ago and yesterday I've had 2 consecutive grey screens with restart and another one today. It happened while opening a movie in vlc or when exiting full screen ...
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0answers
64 views

updating two identical machines results in two different Darwin kernel versions reported

I have two identical Mac Minis and I updated each with all available updates. This caused both machines to go from OS X 10.9.2 to OS X 10.9.4. However, uname -a reports different kernel versions for ...
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3answers
111 views

What does “Vector 0xdd(TMR)” do and how can I fix a problem that I'm having with it?

I am currently having problems with kernal_task using ~2GB of RAM and looking at what advice exists I ran sysdiagnose and in powermeterics.txt I found that Vector 0xdd(TMR) was doing ~20,000 ...
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1answer
150 views

MacBook Air slow after waking from sleep

The backlight on my MacBook Air broke about a week ago and it fixed by Apple by them replacing the logic board. Since I've got it back I've had a couple of issues. Firstly, the machine wouldn't work ...
1
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1answer
62 views

Force a read-only mount of startup disk

I want to create a MacOS recovery startup disk on a USB flash drive. In order to maintain the integrity of the drive's contents (and, perhaps more importantly, reduce write wear on the flash drive ...
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0answers
35 views

Kernel and Installer HUGE RAM usage

I just realised why my computer getting so slower. I have 8 GB of RAM and usage of kernel is 4,5 GB and the process called Installer taking 1,5 GB, and all that with only finder running! Do I need ...
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0answers
83 views

How to forcibly unload kernel extension

I am using Paragon NTFS to mount an external USB hard disk formatted in NTFS. Occasionally the NTFS kernel extension will hang, especially after writing a lot of data. Running $ umount ...
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1answer
26 views

rEFIt defaulting to 32bit kernel

rEFIt is defaulting to the 32bit kernel of OS X which will not boot and will show this error message: at boot I have to press F2 then manually select the 64bit kernel. How do I change the default ...
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0answers
32 views

Do Mac versions (Snow Leopard, Mountain Lion, etc.) have a built-in “framebuffer” in their kernels?

Assuming you try to install Snow Leopard on an x86 board that has no GPU or integrated graphics, but only a, say, CRTC or such, does it have support to plot data on the screen without depending on any ...
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0answers
240 views

Is there a way to generate a kernel core dump file after a kernel panic occurred on OSX?

I need to debug a kernel panic and the current information in the kernel panic log file is insufficient. The only information available on that matter is in the following link: ...
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2answers
432 views

OSX programs crashing, 'Kernel: file: table is full'

Over the last few months, I've seen increasingly erratic behaviour on OSX (10.8.5). Chrome won't load elements on a page, my dev tools crash etc. Recently I had a look in Console and found that ...
2
votes
1answer
57 views

Why doesnt /proc exist in MacOS?

What is the reason that /proc does not exist in MacOS. I was curious to find file descriptors that a process was using in my Mac. The way I do it in linux is to go in /proc/fd folder of that process. ...
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0answers
295 views

IOStorageFamily / IOSCSIArchitectureModelFamily kext errors on Mavericks

Occasionally when I start up my Mid-2012 Macbook Pro, I see the following error messages a few moments after logging in: This happens about every second or third login. After seeing these error ...
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4answers
7k views

How to disable the SpeedStep when using MacBook Pro without a battery?

First of all, the specs: MacBook Pro (15-inch, Early 2011) OS X 10.9.1 (Mavericks) 2.3 GHz Intel Core i7 8 GB RAM The Problem Recently, my battery randomly died and I had to disconnect it, ...
5
votes
1answer
322 views

How to access /dev/mem in OSX?

How I can access /dev/mem (or /dev/kmem, /dev/pmap) equivalent device in OSX? As far as I know it was removed in some point. Can I create this node manually somehow or any other way of dumping the ...
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0answers
561 views

Repeated Kernel Panics & Freezing on Late 2012 Mac Mini 6,1. Help please with the Log

I've had massive problems with my Mac Mini recently. It has been freezing and rebooting after around 10 to 50 minutes use. It's a Late 2012 Mac Mini 6,1 with 8gb of memory. The problems got worse ...
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2answers
5k views

I'm suffering from the excessive CPU use from kernel_task

My mac recently has gone wild with kernel_task. It slows down the computer, the fans blow wildly for around ten minutes after startup (shut down, restart or sleep). I did an EtreCheck scan and got ...
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1answer
856 views

MacBook pro boot Kernel panic no kext summary

Yesterday my Mac crashed and after trying to turn it on again I recieved a message like this: panic(cpu 0 caller 0xffffff800667b0b2): "VM page 0xffffff800ad5fad0 should not have an ...
3
votes
1answer
112 views

Can OS X dump cores in the working directory instead of /cores?

I don't know when it started, but at some point, OS X started dumping cores into a special folder (/cores). This is a pain since they get jumbled together and it's hard to keep track of which core ...
13
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2answers
4k views

Insanely high kernel RAM usage (over 9GB) in Mavericks

I upgraded to Mavericks yesterday, and everything seemed to go fine, but today I noticed that my computer was becoming a bit slow. I checked Activity Monitor, and CPU / disk were at normal levels so I ...
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2answers
6k views

Upgrade to OSX 10.9 from 10.8 causes random restarts

I recently upgraded my MacBook Pro (late 2011, core i5 2.4ghz, 8 gigs of ram) to OSX 10.9 from 10.8 (which in turn I upgraded from Lion). The installation seemed to go well and everything was great ...
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1answer
3k views

Is integrated VRAM included under `kernel_task` RAM in Activity Monitor?

I was stunned to discover that Mac OS X kernel can consume 750MB of RAM. A few related questions: Is it a problem if kernel_task is routinely above 130MB on mid 2007 white MacBook? kernel_task using ...
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0answers
247 views

rEFInd Linux Kernel Boot Options

When booting opensuse via rEFInd, the kernel options are wrong (the root device name is incorrect). Where do the kernel arguments that rEFInd is using come from, and how do I modify them? The line ...
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0answers
277 views

Is Kext Utility a safe utility to use?

I've download Kext Utility from this site and I wonder if it is a safe utility to use and if there are any case of damage after using it. I have to install PS/2 driver in my Mountain Lion for using a ...
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0answers
214 views

How to take advantage of Intel's SpeedStep technology

I've never formerly know about Intel's SpeedStep capabilities in my Mac(Book Pro 5,1) until the last few days. And let me say that the possibility to make the battery last longer is good enough to ...
2
votes
1answer
2k views

Latest OS X update causes Finder crash (SIGSEGV)

Does any one know how to fix an error like this? Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000102e50cf2 My Finder keeps crashing after updating my Mac ...
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1answer
2k views

Mountain Lion Screen Freeze

My Mountain Lion is keeps freezing from few weeks, today it freezes/crashed couple of times already. Here is the log before the big freeze (file /var/log/system.log): SIMBL Enabler for Sandboxed ...
4
votes
1answer
1k views

OS X's “free” or “/proc/meminfo” equivalent

OS X lacks the "Linux-friendly" free or /proc/meminfo. What would be the most reliable and backwards-compatible way of extracting this info: Current free memory, in bytes Going back as far as ...
1
vote
1answer
39 views

Does iOS have the capability to execute multiple apps in memory, and enable you to switch between them, restoring the previous state?

This is for buying purposes; i.e. does the kernel schedule the processes and threads belonging to every process, and do the apps save states that can be resumed at the user's discretion? Please fill ...
2
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0answers
41 views

Why after installing MacPorts the kernel_task RAM size raised x1.5?

I noticed that before installing MacPorts the kernel_task RAM usage was about 200-300 Mb. After installing that the process is using 482.5 Mb real RAM. What are the components (maybe .kexts, which ...
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0answers
733 views

Error message, “hpPlugInInit.kext was installed improperly”

I recently bought a MacBook Air and transferred my system information and user data via Migration Assistant. I used to get error messages on my old computer like this: The system extension ...
2
votes
1answer
187 views

Error in logs: kernel[0]: Validation failed, dataSuffix

I've the following errors in my system logs when running Pages (or any iWork app): Aug 4 19:01:09 kernel[0]: Validation failed, dataSuffix: Aug 4 19:01:09 kernel[0]: b9 d5 6f e2 28 3e b9 48 82 12 ...
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0answers
195 views

Custom XNU Kernel

I have already submitted this question on StackOverflow but I figured that this may be a more appropriate location. I'm building a custom kernel for Mac OS (Mountain Lion, Darwin 2050.22.13). I can ...
2
votes
2answers
980 views

kernel_task is using 90% CPU, what could be the cause?

I have a 13" MBP late 2009, 2.53 GHz, 4 GB RAM, and on OS X 10.8.3. As soon as I boot up the fans start going at the highest rpm and like I mentioned the kernel_task is always at around 90% when no ...
1
vote
1answer
269 views

Freezing, disk i/o problems iMac

I have a desktop iMac with Snow Leopard installed on it. Every few minutes, I get freezing and "kernel disk0s2: I/O Error" in my console. I did some research, and found that my hard drive (a WD I ...
0
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1answer
112 views

Kernel Tasks Swamping processor-2012 13" Retina

Acquired a 13" Retina liquid damaged - Apple Certified Tech. Trying to salvage. Haven't disassembled yet to see the extent of the liquid but it boots and runs. No liquid spill indicators triggered. ...
3
votes
1answer
87 views

How do I read this Activity Monitor report?

I was trying to figure out why my Mountain Lion server was running slow, and I when I opened Activity Monitor this is what I saw: Question 1: how am I getting >400% of CPU on the summed CPU column, ...
4
votes
1answer
249 views

MacBook unusable due to kernel_task

I've disabled hibernation, and removed the sleep image file. I shutdown my Macbook Pro (15" retina), unticked the box to open windows on restart, and started my MacBook again. As soon as I'd logged on ...
2
votes
2answers
2k views

TrueCrypt fails with fusefs kext error

After upgrading to Mountain Lion, I can't mount any volumes with TrueCrypt 7.1a anymore. After typing in the password for the volume, an error message is shown, stating that the fusefs kext can't be ...
2
votes
1answer
1k views

Can one influence Mac OS X's / Darwin's filesystem caching behaviour?

I have the following problem: When I run processes that consume a lot of memory, Mac OS X seems to refuse to release a large portion of the filesystem cache: In fact, instead of letting go of the ~ ...
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0answers
105 views

What can cause multiple processes on Mac with the same PID in some cases?

why there are many similar processes running at the same time. For instance : 2 SystemUIServer, same Pid, same user both Ipv4 type or 14 mdsnresponder, pid 29 half iPv4 and ipv6 types.
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vote
1answer
547 views

What the heck is “npvhash=4095”?

I've been using Mac for 15 years, and I've had relatively few problems. Many years ago, I was using a MBP 17" which sometimes was completely freezing: the only way to wake it was to hard-reset it ...
0
votes
1answer
234 views

What is writing to Disk causing eventual Beach-ball-of-death

What is running my machine down? This is iotop output...I still can't tell what is driving my system to a halt. Command+i on the SSD shows my "used space" slowly changing. It does this for about an ...
2
votes
1answer
283 views

How do I increase “ulimit -u” (max user processes)?

I can change all of the usual ulimits via (for instance) ulimit -n 8192 and launchctl limit maxfiles 8192 8192. Somehow, this doesn't seem to work for -u, the maximum number of user processes: ~$ ...
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1answer
1k views

Why is `/etc/sysctl.conf` not determining my `kern.maxfiles` setting?

I've been having a persistent "too many open files in system" error on my machine (OSX 10.7.5). When I run sysctl kern.maxfiles and sysctl kern.maxfilesperproc, both output 2048. This article says ...
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2answers
6k views

Where can I download the Darwin 12.2.0 source code?

I'm wondering where I can download the source code of the kernel of Mac OS X Mountain Lion 10.8.2: Darwin 12.2.0. I googled it, but its hard to find. And yes, I tried http://www.opensource.apple.com. ...
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vote
1answer
903 views

“Too many open files” - how can I set the ulimit -n value for emacs on Lion?

I've seen other questions covering the topic of how to set the file limit on Leopard/Lion. For example: How to properly increase ulimit -n on Lion? Too Many Open Files But after reading ...
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1answer
375 views

What bitness is Mountain Lion kernel, because `uname -p` returns `i386`?

I know, the answer should be 64, as Apple dropped support even for their early 64 bit models BUT: Nathan-der-Graue:~ max$ uname -p i386 while on the other hand: Could someone please clear this ...
2
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1answer
2k views

How to unload kernel modules

When I run kextstat, it gives me a list of the currently loaded kernel modules. How to I go about using the information gathered from this command to unload a kernel module?