Mac OS X's task manager utility application. It is used to perform different tasks on computer processes, as well as monitor system resource usage.

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5
votes
2answers
2k views

How many cores does a Mid 2012 Macbook Air have?

I checked the specs, and the i5-3427U CPU has 2 cores. But the Activity Monitor shows 4 little charts for the CPU, so it looks like 4 cores. Which is correct? Why does the Activity Monitor have 4 ...
0
votes
1answer
363 views

Why do httpd and mysqld processes not show up in Activity Monitor?

I'm running Mountain Lions built in Apache2 server. I have started the server and I can see the web pages but I can't see any httpd process in the Activity Monitor. Same goes for MySQL. I can't see ...
0
votes
1answer
288 views

Keyboard Viewer via keyboard shortcut wont actually quit after closing it

I managed to add a shortcut for keyboard viewer via BetterTouchTool. However, once I run Keyboard Viewer and close via the red X button, I cannot re-open it again via a shortcut. So I checked activity ...
1
vote
2answers
2k views

What's the difference between real memory and CPU, and what are there effects on the performance of my computer?

In Activity Monitor, there are a couple fields: "PID", "Process Name", "User", "%CPU", "Threads", "Real Mem", and "Kind". I'm not familiar with the inner workings of computers and the related ...
6
votes
2answers
6k views

How does 'stuck' (in results of 'top') relate to 'not responding' (in Activity Monitor), 'spin' or 'hang'?

In results of top commands, I sometimes see stuck. Apple's top(1) OS X Manual Page does not explain this use of the word. How, if it all, does stuck relate to the following? not responding – ...
2
votes
3answers
1k views

Getting a list of currently running processes

I'd like to get a list of all the applications currently running on my machine using the command line. It should be similar to what you get when you open up Activity Monitor and choose to save the ...
6
votes
1answer
2k views

Why does Apple Activity Monitor report that my Mac with a dual-core Intel i5 Ivy Bridge CPU has 4 cores?

I just got a new Apple MacBook Pro 13", mid-2012, which has a dual-core Intel i5 Ivy Bridge CPU. When I run Activity Monitor and turn on the Floating CPU Window, it shows a 4-bar graph (indicating 4 ...
8
votes
5answers
7k views

Alternative activity monitors for OS X?

I’m a bit intrigued by the new detailed activity monitors and progress indicators in Windows 8 (copying files, the task monitor, network activity, etc.) It got me thinking: surely there must be some ...
1
vote
3answers
936 views

Memory usage on Mac OS, how Activity monitor works?

I have these stats, but is the system really using almost 4GB? This Inactive memory... Can't I use it? How should I interpret these stats?
4
votes
2answers
215 views

Why can't this process terminate?

Just recently I ran into an issue where my network program couldn't bind to a port because it was already in use. I opened the activity monitor and realized it (named "server") was already running ...
0
votes
1answer
285 views

How many threads is normal in OSX Lion?

I just rebooted my system and right now Activity Monitor is showing over 500 threads running. Before I rebooted it was over 900. Is that normal?
4
votes
1answer
4k views

VM size in Activity Monitor: hundreds of GB?

When I open the Activity Monitor, I get something looking like this: http://support.apple.com/kb/HT1342. But why the heck is "VM size" around 100-200 GB?? Here is the capture from the apple support: ...
3
votes
1answer
5k views

Make Activity Monitor show more than 4 cores worth of CPU usage in the Dock

Is it possible to force more than 4 cores in the Dock, this looks like a feature apple does not want after checking out Mac OS X: Activity Monitor shows one CPU Usage graph on systems with more than ...
2
votes
1answer
199 views

Activity process does not terminate?

I am using a Mac and I use Macvim for programming. If my program happens to go into an infinite loop and I have to quit Macvim and restart it due to this the program will restart but the program ...
4
votes
2answers
1k views

Help identify what uses the CPU when the Activity Monitor list of all processes does not help

Problem After rebooting, and with only Activity Monitor open, my MacBook Pro (10.6, i7) shows a very high idle % (98% or higher) but then shortly after drops down to 40% - 50%. In the Activity ...
2
votes
1answer
323 views

What is webfilterdnsd process?

What is webfilterdnsd process running on my machine? Its started by user "nobody". Not able to find any other information on it online. How can I get more information on processes running on my mac? ...
4
votes
2answers
333 views

How can one filter MULTIPLE processes in Activity Monitor?

How can I look at several processes at once, instead of just one? For example… typing in bash, shows bash processes.. how to I show both bash and say httpd? First thoughts.. bash|httpd, no. Or bash ...
7
votes
5answers
10k views

Issue with deleting user account

I want to delete a user account before selling my machine, so I chose the secure delete account option in System Preferences > Users & Groups. I think I saw a progress bar at first as it was ...
4
votes
7answers
8k views

How can I see bandwidth usage on a Mac?

I am having internet problems and the ISP technicians suggested that something is using my bandwidth. Is there a software to monitor which processes use how much bandwidth?
0
votes
1answer
79 views

Is there an utility which can profile and report on the activity of a single process?

Activity monitor can report on a single processes's disk and cpu usage at a single point in time. The "Sample Process" feature is good for debugging, but doesn't provide easily digestible ...
1
vote
2answers
359 views

Activity Monitor showing ~3,000% percent CPU under normal use

Shows huge percentages for dropbox but total is normal, and everything seems to be running fine. I have a Macbook with Intel Core2Duo
0
votes
2answers
2k views

How can I see which processes are draining my macbook battery by percentage?

Android devices have a screen that shows you approximately what applications and processes are using your battery, by percentage. I'm wondering, in theory, can this be done on a MacBook? How do you ...
6
votes
3answers
33k views

Managing and removing startup processes on OSX Lion

My Startup Items for my username (i am admin) shows only dropbox - yet a look at my processes (in activity monitor) shows other helper processes from Adobe, Lexmark, etc, etc. Where can I see and ...
4
votes
1answer
15k views

how to start/stop/restart processes

As a new comer from Windows OS, I wonder how to start/stop/restart a service on Mac OS X Snow Leopard 10.6.8 ?(it's straight forward on Windows using its Task Manager). I tried Activity Monitor, but ...
2
votes
1answer
372 views

Mac app to show cumulative CPU usage?

Activity Monitor will show you how much CPU time the current instances of each process have taken. I want an app that will show the total CPU time all instances of each process have taken, so I can ...
7
votes
2answers
698 views

How can virtual memory be greater than the total available space?

Why does my MBP sometimes report VM Size: 300+ GB in Activity Monitor under System Memory tab, when my hard disk size is only 250 GB (total) and RAM is 4GB? I know it can't magically get that extra ...
6
votes
7answers
10k views

How to monitor file access for an OS X application?

I am looking for the OS X corespondent of FileMon, that was later included in ProcessMon. BTW, it is essential to be able to filter by process.
0
votes
0answers
473 views

What is “Software Update” doing when it says “Checking for new software”?

"Software Update" seems to take a long time. What's it doing? Utilities -> Activity Monitor yields: CPU usage low ( 1% - 2% ) by the "Software Update" process. + network traffic inbound, ...
15
votes
5answers
22k views

How do I debug an out-of-control “kernel_task” process?

Just recently I noticed my battery life having a pretty significant drop and the "kernel_task" process using quite a bit of CPU (a constant 1-6% on my 2.8ghz dual-core i7, 2010 MBP). Obviously I think ...
2
votes
3answers
521 views

What are the alternatives to Activity Monitor that will summarize cpu time over time?

Activity monitor is not always good if you want to see what is keeping your computer busy for a period of time. For example if you have gcc executed hundred of times it will take a lot of CPU power ...
11
votes
6answers
7k views

What's triggering my Finder's CPU binges?

A few times a week, the Finder on my Macbook shoots up to around 100% CPU use, and the fans start blasting. I've done everything I can think of - repaired permissions, rebooted, trashed preferences, ...
4
votes
2answers
477 views

What process is accessing the hard drive?

I can hear the hard drive chugging away when it should be idle. Some process is writing/reading from it in semi-random bursts, let's say once every second. Very annoying and wasteful. I tried ...
4
votes
2answers
419 views

How do I tell what processes are driving I/O loads?

Something is driving a lot of Disk I/O on my system lately. I can see in ActivityMonitor that there are huge volumes of reads and writes every second. But none of the "normal" suspects are active when ...
8
votes
1answer
1k views

What's the racoon doing in my apple?

I'm not normally one for paraniodly checking my activity monitor for rogue processes; but this one just has my internal nature-watcher all curious. Why is there a racoon running under my root user? ...
5
votes
3answers
2k views

MacBook Running Really Slow, Activity Monitor Reports HUGE VM

My MacBook is running really really slow at the moment, I have quit loads of processes (but activity monitor only reported about 10% cpu usage anyway). I had just noticed I have a VM Size of 250GB! ...
7
votes
6answers
24k views

Is there a keyboard shortcut for launching Activity Monitor?

I can't seem to find a shortcut for launching the activity monitor. Does it have one?
30
votes
3answers
15k views

What's the difference between Real, Virtual, Shared, and Private Memory?

The different columns in Activity Monitor are a little confusing
9
votes
1answer
2k views

What does it mean when a %CPU exceeds (# of cores) x 100%?

Several responses to a question I asked earlier suggested I try Opera kiosk mode, so I decided to download it and give it a try. Once the download had completed and the disk image was being verified, ...