The core part of an operating system.

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2
votes
1answer
79 views

Why doesn't /proc exist in OS X?

What is the reason that /proc does not exist in OS X? 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. ...
0
votes
0answers
22 views

Cannot load the Built-in keyboard kext on Macbook pro

I needed to disable my internal keyboard for a while. What I did was try this: sudo kextunload /System/Library/Extensions/AppleUSBTopCase.kext/Contents/PlugIns/AppleUSBTCKeyboard.kext/ Though that ...
1
vote
0answers
33 views

Issues with /usr/lib/libcups.2.dylib. x86 applications will not execute

I upgraded CUPS from 2.0.0 to 2.0.2 on OS X 10.10.4 Yosemite for security reasons per advisement from a Nessus scan. I committed the cardinal sin of not backing up my OS before making this change. ...
1
vote
2answers
6k 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 ...
2
votes
6answers
3k views

My mac has 64-bit EFI, but it only boots with 32-bit kernel

I followed the guide at http://macperformanceguide.com/SnowLeopard-64bit.html to boot into 64-bit mode. I had no problems with the instructions and on the boot screen it says "PAE enabled, 64bit mode ...
2
votes
1answer
353 views

How to investigate high kernel task memory usage?

I was using my MBP (with 16GB of RAM) as usual and out of blue I've this popup that: Your system has run out of application memory. To avoid problems with your computer, quit any applications ...
0
votes
1answer
111 views

Mid-2014 15" rMBP: Crashes on OS 10.9.5

Update #2: The MBP crashed at 1:31am in the morning while sleeping. Console log and kernel panic log enclosed below: ======== Console Log: 4/22/15 1:29:52.000 AM kernel[0]: ...
1
vote
1answer
54 views

Is there a way to see what kernel task is doing?

I found a question (and answers) about What exactly does kernel_task do?. What I want to know is how I can inspect what kernel_task is doing at any given moment in time? Does it get logged so that I ...
1
vote
0answers
178 views

OSX Yosemite Kernel Panic

Okay, so I use Teamviewer to remote into this computer while at work, that might explain why the BSD process name corresponding to current thread is TeamViewer_Deskt, not sure. I was on today and it ...
7
votes
3answers
996 views

How to get a mac to wait longer for external disk to wake up upon resuming from sleep?

My Mac has an external disk attached, and I often get "disk not ejected properly" warnings after resuming the computer from sleep. These warnings appear only when the disk has spun down during the ...
0
votes
1answer
1k 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 ...
1
vote
2answers
102 views

Inspecting kernel_task

I have two MacBooks, one with a fresh OS X install and one with an older install. The older one has a kernel_task taking 1.52 GB of RAM. The newer one—416 MB. These aren't identical machines or ...
1
vote
1answer
151 views

How can I identify files and programs connected to the kernel_task process in Mac OS?

I understand that the kernel_task process is linked to several .kext files found in System/Library/Extensions (and possibly Library/Extensions ?) How can I identify which files are contributing to ...
1
vote
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 ...
1
vote
2answers
224 views

Kernel_task boosts CPU to 300%-500% (Yosemitte MBP 2011 without a battery)

Long story short, my oldie MBP 2011' battery started bloating, I've contacted a repair service center and they advised me to remove the battery and use it on AC power, while they get a new battery for ...
0
votes
0answers
29 views

Temporarily disable AES-NI hw.optional.aes setting via sysctl

Posted already on Stack Overflow, no answers though: http://stackoverflow.com/questions/28268498/temporarily-disable-aes-ni-hw-optional-aes-setting-via-sysctl For testing reasons I would like to ...
0
votes
3answers
847 views

Why won't kern.maxfiles setting in /etc/sysctl.conf stick?

I've been getting various "too many files open in system"-type errors on Yosemite (10.10.1). Searching around suggests setting kern.maxfiles and kern.maxfilesperprocess in /etc/sysctl.conf. I've ...
1
vote
1answer
998 views

How to find what cause Mac OS kernel panic?

For last times i have kernel panics at least once a day. Anyone have suggestions how i can find what cause issue and how to fix it? I have latest Yosemite updates installed. Here is latest Problem ...
1
vote
2answers
765 views

Macbook Pro.[Mid-2012] Sound isn't working

Suddenly, My MBP sound isn't working. I have tried couple of way to resolve the problem but nothing is working. Here is some of the screenshot: No, input or output sound. I would like to know 1) ...
0
votes
1answer
712 views

Safari keeps Crashing due to External Modification Warning

In the last 24-hours my Safari has gone haywire. I cannot access the program to even get into my Safari Preferences without getting the following message! Any idea how to cure this? Process: ...
-1
votes
2answers
52 views

Is it theoretically possible for DirectX to work on OS X natively?

As far as I can tell, DX as a software-component is tightly wound to Windows as for hardware-acceleration and is provided as a set of DLLs and a runtime system for applications that depend on it; ...
10
votes
3answers
22k views

What exactly does kernel_task do?

I'd just like to know what it is that kernel_task is responsible for. Also, what's an acceptable maximum RAM and CPU use for it?
1
vote
1answer
344 views

How to disable logging to system.log in OS X?

During my time with Yosemite, I've had an innocuous issue that gets logged to system.log non-stop. This question is not about solving the issue. I'd like to stop the chatter, because they're writes ...
0
votes
1answer
95 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
votes
1answer
265 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 ...
1
vote
0answers
283 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 ...
14
votes
2answers
6k 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 ...
2
votes
3answers
229 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 ...
4
votes
1answer
388 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 ...
4
votes
1answer
424 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: ~$ ...
3
votes
1answer
266 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 ...
0
votes
1answer
261 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
vote
1answer
145 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 ...
2
votes
2answers
808 views

Serious system issue - kernel extensions installed improperly

I have just gotten an error message for every single kext file there is. the error message goes something along the lines of: The system extension "*file path*" was installed improperly and cannot be ...
0
votes
0answers
48 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 ...
0
votes
1answer
40 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 ...
2
votes
2answers
1k 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
0answers
417 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: ...
3
votes
2answers
7k 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 ...
6
votes
1answer
586 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 ...
2
votes
1answer
320 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 ...
2
votes
2answers
1k 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 ...
10
votes
4answers
15k 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, ...
1
vote
0answers
430 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 ...
4
votes
3answers
1k views

I see thousands of these in my Console log

8/5/11 5:21:37 PM kernel FireWire GUID ffffffffffffffff is invalid! I have a Macbook Pro Core 2 Duo running Snow Leopard. Any suggestions?
0
votes
0answers
743 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 ...
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 ...
0
votes
1answer
6k views

Errors on kernel.log… how do I fix them?

My mac is apparently working fine, no crashes of any kind, but my kernel.log is full of errors and that is worrying me, as I never saw it with messages like that. This is a sample of today, since I ...
8
votes
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 ...
1
vote
0answers
348 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 ...