Activity Monitor not opening???

So I've read all the topics and followed all the advice ie. -
-removed my activitymonitor.plist and restarted
-verified and repaired all my permissions
-login as a different user and tried it
to no avail my console still says: Activity Monitor[255] The tool is not setuid root - please repair the privileges
Are the priveleges different that the permissions? how/where do I repair them?
I also read something about receipts but couldn't find one for the activity monitor. I hope I don't need to reinstall osx as I've lost my original disks in a house fire
Any help is appreciated in advance...

That is odd, I attempted to copy my Activity Monitor.app to a diskimage but it complained that special permissions would be lost. I then zipped it without incident, uploaded it to a server, then downloaded it and it refused to open!
Maybe someone else can shed light on these happenings.
Oh, and yes, privileges are the same as permissions.

Similar Messages

Activity monitor not showing activity

recently upgraded to 10.4.9, tho not sure that is the issue. When I open Activity Monitor there are no processes listed regardless of what I ask it to list (my processes, admin proc., etc.) I trashed the plist and repaired permissions without effect. AM will still show me CPU usage and disk activity in the lower 1/2 of its window, but nothing about memory and nothing at all in the upper 1/2 of the window. Any ideas?
thanks
Steve
Core 2 Duo iMac Mac OS X (10.4.9)

Thanks, Baltwo and Ferd II. I just restarted from a clone backup I did prior to updating to 10.4.9. It was 10.4.8 and the same problem was there with AM. (I don't use AM that often so it could have been there even longer.) Also, the v. of AM was the same as on the drive with 10.4.9— 1.0(19). So, I don't know that reinstalling the combo will install a new AM. (And, since things are otherwise working great, I'd rather not mess with the system.)
Is there a way of downloading a new AM from somewhere. Couldn't find it on the Apple downloads. Or can it be individually restored from my original disks? (Knock on wood, I've never had to restore in all the years I've had macs.)
BTW, Baltwo, this v. of AM's menu bar reads: AM, File, Edit, Monitor, Process, Window, Help. A difference with Intel app vs. your G4, Baltwo?
thanks
Steve

Help needed--activity monitor not working properly

Activity Monitor is currently not showing any processes, no matter what I do. Otherwise, it appears to be functioning normally. I just can't see any processes listed. Also, A.M. works normally in a different account on my MBP.

Hi
In your user account Library/Preferences/ folder, there's a file com.apple.ActivityMonitor.plist Quit AM first, then drag this file to the trash. This is the preference settings file for AM & it's possibly gone a bit odd. A new one will be created when you next open AM - any setting/display changes you made in AM will be lost.
Try that - if it's ok now, just forget the file you trashed.

Activity Monitor not working correctly / not listing processes

When I open Activity Monitor, it does not display a list of processes. The CPU usage works in the bottom of the window as does the disk usage. None of the other graphs display any graphing/data.
I have rebooted, relaunched AM and I selected "all processes" but it still doesn't show processes.
I used the terminal command "top" and can see processes in the terminal window.
thanks for any assistance,
Harold
imac 2.8 dual core/24"/2gb/os10.5.5

Thanks for the quick reply. I couldn't find the activity monitor preferences file you specified, in the Preferences directory. Here's what I've done: I rebooted from an older backup image on my external drive that I made using superduper. The activity monitor app worked from this disk image. I copied the AM app into my current drive, where it showed as a copy.
I rebooted, and attempted to use this copy. It wouldn't let me due to file permissions problems of some sort. I opened the current version of AM and now it works.
I'm not sure what fixed the problem, but Activity Monitory now seems to be working OK.
thanks,
Harold

Activity Monitor not working at all

My activity monitor never shows any processes, even though I have Safari open right now.

Oh.
Have to say I have not heard of this this happening before. It is most unusual.
In Activity Monitor's menu, under View, Columns, are any selections made. Does selecting and deselecting any make any difference?
Does Activity Monitor operate normally in another account?
If not you may have to reinstall it from the DVD using Pacifist
And to avoid any problems in using it, read the documentation here:
Pacifist Documentation. Click on Usage to see examples.

Activity Monitor not showing any processes

See picture: http://bostonwebstudio.com/picture1.png
Hello all, my activity monitor opens as it should, the bottom section works as it should, but the Processes list fails to appear, not matter which list I choose to show (My Processes, All Processes, etc.)
Here's what I've done:
- Booted from install disk and completed a permissions repair.
- Booted from install disk and completed a disk repair.
- Restarted the computer.
- Slept on it.
Nothing has worked; any ideas?

Hi, Marc.
Delete the word "Local" from the search field in Activity Monitor's tool bar: click the (X) next to "Local" in the search field and all should be well. There are no processes matching that search term, hence none are shown!
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X

ACTIVITY MONITOR WONT OPEN! PLEASE HELP

How come everytime I open ACTIVITY MONITOR i just get the color wheel and it never opens?

Date/Time:       2012-02-10 18:00:55 -0500
OS Version:      10.6.8 (Build 10K549)
Architecture:    x86_64
Report Version: 7
Command:         Activity Monitor
Path:            /Users/katie/Desktop/Activity Monitor.app/Contents/MacOS/Activity Monitor
Version:         10.6 (212)
Build Version:   551
Project Name:    ActivityMonitor
Source Version: 2120000
Parent:          launchd [99]
PID:             151
Event:           hang
Duration:        6.68s (sampling started after 2 seconds)
Steps:           27 (100ms sampling interval)
Pageins:         21
Pageouts:        0
Process:         Activity Monitor [151]
Path:            /Users/katie/Desktop/Activity Monitor.app/Contents/MacOS/Activity Monitor
UID:             502
Thread 47c        DispatchQueue 1
User stack:
    27 ??? (in Activity Monitor + 6996) [0x100001b54]
      27 NSApplicationMain + 364 (in AppKit) [0x7fff811c23b0]
        27 -[NSApplication run] + 395 (in AppKit) [0x7fff811c968f]
          27 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 155 (in AppKit) [0x7fff81203801]
            27 _DPSNextEvent + 1191 (in AppKit) [0x7fff81204095]
              27 AEProcessAppleEvent + 48 (in HIToolbox) [0x7fff877f0619]
                27 aeProcessAppleEvent + 210 (in AE) [0x7fff821dc12b]
                  27 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 32 (in AE) [0x7fff821dc224]
                    27 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 162 (in AE) [0x7fff821dc32b]
                      27 _NSAppleEventManagerGenericHandler + 114 (in Foundation) [0x7fff85133f06]
                        27 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 360 (in Foundation) [0x7fff851340d6]
                          27 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 77 (in AppKit) [0x7fff812fefd9]
                            27 -[NSApplication(NSAppleEventHandling) _handleAEOpen:] + 219 (in AppKit) [0x7fff812ff35d]
                              27 -[NSApplication _sendFinishLaunchingNotification] + 66 (in AppKit) [0x7fff8123437f]
                                27 -[NSApplication _postDidFinishNotification] + 100 (in AppKit) [0x7fff8123444a]
                                  27 -[NSNotificationCenter postNotificationName:object:userInfo:] + 101 (in Foundation) [0x7fff850fca36]
                                    27 _CFXNotificationPostNotification + 200 (in CoreFoundation) [0x7fff874da548]
                                      27 __CFXNotificationPost + 1008 (in CoreFoundation) [0x7fff874edfd0]
                                        27 _nsnote_callback + 167 (in Foundation) [0x7fff85105ad5]
                                          27 ??? (in Activity Monitor + 38377) [0x1000095e9]
                                            27 ??? (in Activity Monitor + 39148) [0x1000098ec]
                                              27 ??? (in Activity Monitor + 39892) [0x100009bd4]
                                                27 ??? (in Activity Monitor + 41655) [0x10000a2b7]
                                                  27 read + 10 (in libSystem.B.dylib) [0x7fff80aba466]
Kernel stack:
    27 lo64_unix_scall + 77 [0x2a251d]
      27 unix_syscall64 + 617 [0x4f82fb]
        27 read_nocancel + 158 [0x49fd75]
          27 write + 312 [0x49f5f9]
            27 pipeinit + 2205 [0x4a154f]
              27 soreceive + 1134 [0x4b959f]
                27 sbwait + 150 [0x4bb742]
                  27 msleep + 157 [0x49149d]
                    27 wakeup + 334 [0x490daa]
                      27 lck_mtx_sleep + 87 [0x221d42]
                        27 thread_block + 33 [0x227654]
                          27 thread_block_reason + 331 [0x2275c6]
                            27 thread_dispatch + 1966 [0x227327]
                              27 machine_switch_context + 659 [0x2a9adb]
Thread 485        DispatchQueue 2
User stack:
    27 start_wqthread + 13 (in libSystem.B.dylib) [0x7fff80ac9aa5]
      27 _pthread_wqthread + 353 (in libSystem.B.dylib) [0x7fff80ac9c08]
        27 _dispatch_worker_thread2 + 252 (in libSystem.B.dylib) [0x7fff80aca2de]
          27 _dispatch_queue_invoke + 185 (in libSystem.B.dylib) [0x7fff80aca7b4]
            27 kevent + 10 (in libSystem.B.dylib) [0x7fff80ac8c0a]
Kernel stack:
    27 kevent + 97 [0x47a699]
Binary Images:
         0x100000000 -        0x10002dff7 com.apple.ActivityMonitor 10.6 (212) <1A887794-51A5-8C1B-D06A-FB0E7B5E6B93> /Users/katie/Desktop/Activity Monitor.app/Contents/MacOS/Activity Monitor
      0x7fff80aaf000 -     0x7fff80c70fef libSystem.B.dylib ??? (???) <9AB4F1D1-89DC-0E8A-DC8E-A4FE4D69DB69> /usr/lib/libSystem.B.dylib
      0x7fff811c0000 -     0x7fff81bbaff7 com.apple.AppKit 6.6.8 (1038.36) <4CFBE04C-8FB3-B0EA-8DDB-7E7D10E9D251> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
      0x7fff821d9000 -     0x7fff82214fff com.apple.AE 496.5 (496.5) <208DF391-4DE6-81ED-C697-14A2930D1BC6> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.fram ework/Versions/A/AE
      0x7fff850f5000 -     0x7fff85377fff com.apple.Foundation 6.6.8 (751.63) <E10E4DB4-9D5E-54A8-3FB6-2A82426066E4> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
      0x7fff87495000 -     0x7fff8760cfe7 com.apple.CoreFoundation 6.6.6 (550.44) <BB4E5158-E47A-39D3-2561-96CB49FA82D4> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
      0x7fff877bc000 -     0x7fff87abafff com.apple.HIToolbox 1.6.5 (???) <AD1C18F6-51CB-7E39-35DD-F16B1EB978A8> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.fra mework/Versions/A/HIT

Message Services Message Monitor not opening in MII.

Hi All,
We have deployed MII 14.0/ME 6.1 on Netweaver 7.3.
In MII, Message Services > Message Monitor link not opening and we get the following error message.
Has any one faced this issue? whats the fix for this.
Detailed Error Information
Detailed Exception Chain
java.lang.NoSuchMethodError: com.sap.xmii.ejb.messages.MessageService.count([Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Integer;Ljava/lang/String;Ljava/sql/Timestamp;Ljava/sql/Timestamp;[Ljava/lang/Integer;)J
at com.sap.xapps.xmii.ui.admin.messages.messagesmodel.SearchResultObservableList.getSize(SearchResultObservableList.java:52)
at com.sap.xapps.xmii.ui.admin.messages.messagesmodel.SearchResultObservableList.<init>(SearchResultObservableList.java:33)
at com.sap.xapps.xmii.ui.admin.messages.monitorcomp.MessagesComp.search(MessagesComp.java:395)
at com.sap.xapps.xmii.ui.admin.messages.monitorcomp.wdp.InternalMessagesComp.search(InternalMessagesComp.java:243)
at com.sap.xapps.xmii.ui.admin.messages.monitorcomp.MonitorView.onPlugIn(MonitorView.java:702)
at com.sap.xapps.xmii.ui.admin.messages.monitorcomp.wdp.InternalMonitorView.wdInvokeEventHandler(InternalMonitorView.java:429)
at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:142)
at com.sap.tc.webdynpro.progmodel.window.ViewController.invokeInboundPlugHandler(ViewController.java:446)
at com.sap.tc.webdynpro.clientserver.cal.NavigationManager.processInboundPlugQueue(NavigationManager.java:305)
at com.sap.tc.webdynpro.clientserver.cal.NavigationManager.navigate(NavigationManager.java:320)
at com.sap.tc.webdynpro.clientserver.phases.NavigationPhase.execute(NavigationPhase.java:63)
at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequestPartly(WindowPhaseModel.java:162)
at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doProcessRequest(WindowPhaseModel.java:110)
at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:97)
at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:515)
at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:58)
at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.doExecute(ClientApplication.java:1671)
at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.doProcessing(ClientApplication.java:1485)
at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doApplicationProcessingStandalone(ApplicationSession.java:908)
at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doApplicationProcessing(ApplicationSession.java:880)
at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:357)
at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:326)
at com.sap.tc.webdynpro.serverimpl.core.AbstractDispatcherServlet.doContent(AbstractDispatcherServlet.java:87)
at com.sap.tc.webdynpro.serverimpl.wdc.DispatcherServlet.doContent(DispatcherServlet.java:89)
at com.sap.tc.webdynpro.serverimpl.core.AbstractDispatcherServlet.doPost(AbstractDispatcherServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at com.sap.engine.services.servlets_jsp.server.Invokable.invoke(Invokable.java:152)
at com.sap.engine.services.servlets_jsp.server.runtime.RequestDispatcherImpl.doWork(RequestDispatcherImpl.java:373)
at com.sap.engine.services.servlets_jsp.server.runtime.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:499)
at com.sap.tc.webdynpro.serverimpl.wdc.ForwardServlet.doPost(ForwardServlet.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at com.sap.engine.services.servlets_jsp.server.Invokable.invoke(Invokable.java:152)
at com.sap.engine.services.servlets_jsp.server.Invokable.invoke(Invokable.java:38)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:466)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:210)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:441)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:430)
at com.sap.engine.services.servlets_jsp.filters.DSRWebContainerFilter.process(DSRWebContainerFilter.java:38)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.servlets_jsp.filters.ServletSelector.process(ServletSelector.java:81)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.servlets_jsp.filters.ApplicationSelector.process(ApplicationSelector.java:276)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.WebContainerInvoker.process(WebContainerInvoker.java:81)
at com.sap.engine.services.httpserver.chain.HostFilter.process(HostFilter.java:9)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.ResponseLogWriter.process(ResponseLogWriter.java:60)
at com.sap.engine.services.httpserver.chain.HostFilter.process(HostFilter.java:9)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.DefineHostFilter.process(DefineHostFilter.java:27)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.MonitoringFilter.process(MonitoringFilter.java:29)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.SessionSizeFilter.process(SessionSizeFilter.java:26)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.MemoryStatisticFilter.process(MemoryStatisticFilter.java:57)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.DSRHttpFilter.process(DSRHttpFilter.java:43)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.server.Processor.chainedRequest(Processor.java:475)
at com.sap.engine.services.httpserver.server.Processor$FCAProcessorThread.process(Processor.java:269)
at com.sap.engine.services.httpserver.server.rcm.RequestProcessorThread.run(RequestProcessorThread.java:56)
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:122)
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:101)
at com.sap.engine.core.thread.execution.CentralExecutor$SingleThread.run(CentralExecutor.java:328)
Any help would be highly appreciated.
Thanks,

Hi Shridhar,
Check if XMII and MII_ADMIN are from the same SP. That might happen if they are from different SPs.
Best regards,
Krasi

Activity Monitor not working

The activity monitor app stops working frequently. This message appears in the console log :
2/25/09 6:49:52 PM Activity Monitor[1391] * -[NSCFArray objectAtIndex:]: index (17) beyond bounds (17)
Any suggestions ...? Thanks ...

thanks for the suggestion ... however it did not work. I am able to recreate the problem every time I scroll in the process screen when the Activity monitor is running and it is always the same message on the console log :
2/25/09 9:50:03 PM Activity Monitor[174] * -[NSCFArray objectAtIndex:]: index (15) beyond bounds (15)
Any other ideas ? Thanks

Activity Monitor not working correctlyResorting the %cp

Hi,
I've a new iMac, 27 inch, with Maverick installed. I'm having issues with Activity Monitor.
When I open up Activity Monitor, the process window is empty.
Resorting the %cpu tab, shows all of the processes, however it's static, ie the values don't get updated (I tried all frequency updates settings)
When going to the memory tab, all processes show up as 0 bytes
Disk tab also is empty, and stays empty even if i clickt the sort tab
Same for network tab, however after clicking sort it shows the processes, albeit with 0 bytes values and static.
Any advice to fix this would be greatly appreciated. I did already delete com.apple.ActivityMonitor.plist witch didn't change things.
Cheers
Tom

I have exactly the same issue and have no idea how to fix it and what reason to appear it. In my case the issue started roughly after I've updated my MacOS up to 10.9.1

Activity Monitor not displaying processes or anything...

Hey guys,
My Activity Monitor (10.5.1) is not displaying ANY processes, in any of the tabs (system, CPU, etc.). I don't know why- I have a 2.16Ghz 24" iMac (previous iteration).
I did just add a 2gb stick of RAM (booted fine- everything BAR this monitor app is running perfectly). It has 3gb RAM total (previously had 2x1GB sticks). OSX System Profile displays it as 3GB and reads it properly.
Does anyone know why this is playing up, or what I can do? I have AppleCare so I'll call them tomorrow, but thought I'd see if anybody else incurred this problem.
Thanks!
Kendal.
Message was edited by: kendals

Is the little menu on the upper left set to "All processes"?

Activity Monitor not showing all RAM

I just upgraded to 10.6.3 and then 10.6.8 on my Mac Mini. With 10.6.3 Activity Monitor started showing total of 3 GB of RAM instead of 4 GB as System Profile does show. I ran Rember and all tests passed. It showed 4 GB total memory and 1690 MB available memory which seems consistent with AM's Free memory.
Any ideas why the system seems to "see" (System Profiler) all the memory but not be using it (AM)?
Stephen

WZZZ wrote:
I have a related question about the pie chart.
I have 12GB installed. Free at 9.72 + Used at 2.28 adds up to 12GB.
But adding up Wired at 957.4MB, Active at 754.1MB, and Inactive at 632.4MB comes to 2.3GB (rounded). Adding that to the pie chart figure of 11.75 gives a total of 14.05GB, which isn't possible. What does the pie chart figure at 11.75GB represent? It can't be the 12GB minus the Wired, Active and Inactive either, since that would be much less than 11.75. And if it's supposed to be the total of installed Memory, why the missing .25GB?
Wired+Active+Inactive = Used. Thus, 9.72+2.28 ≃ 9.7.2+2.3 ≃ 12. The 11.75 is a mucked up AM reading. Check the memory via About this Mac->More info. Mine shows exactly 12 GB.

Activity monitor not showing all memory

I just upgraded to 10.7.4 on my Mac Mini from a fresh install of 10.6.3. Activity Monitor shows 3 GB available, while System Profiler shows 4GB:
But when I boot back into 10.5.8, all 4GB are there usable in AM.
When I upgraded from 10.5.8, with 10.6.3 Activity Monitor started showing total of 3 GB of RAM instead of 4 GB as System Profile does show. I ran Rember and all tests passed. It showed 4 GB total memory and 1690 MB available memory which seems about consistent with AM's Free memory.
I use Virtual PC and it has a slider bar to set the RAM for the PC. It shows a little more than 3.5 GB available though above 3 GB it is highlighted in yellow, as if caution about trying to use it. So I set it to a little more than 3GB, started V PC and watched its usage climb in Activity Monitor. When it reached about 3GB the whole Mac OSX locked.
So, then I tried a fresh install of 10.6.3 and it has the same behavior and upgrade to 10.7.4 still the same.
Any ideas why the system seems to "see" (System Profiler) all the memory but not be using it (AM)?
Here is a related issue and the poster's solution was to switch the riser cards around:
https://discussions.apple.com/message/11022205?tstart=0#11022205
Maybe I need to swap my memory cards around.

Well, I finally decided to go on and search for the specs on my Mini, even though all 4 GB work under 10.5.8. Here it is:
http://support.apple.com/kb/SP7
"1GB of 667MHz DDR2 SDRAM (PC2-5300) on two SO-DIMMs; supports up to 2GB"
I bought it in 10/2007. Even for that long ago, it seems like 2GB would have been quite limiting. I upgraded to 4GB soon after I got it. So, I suppose that I get anything above 2GB is a bonus.
Seems strange and sad to me but I suppose it is true.
Still will try swapping the cards around... maybe I can still get the newer OS and all 4GB back by some quirk as before.

Activity Monitor not reading USB modem

Activity monitor is not registering network activity when using my USB modem.

Sort by the percent cpu to see which processes are taking the most cpu time. Be sure you select "All Processes" from the Show popup menu tart the top of the window.
The following will give you some infor on how to interpret the memory info in AE.
Using Activity Monitor to read System Memory and determine how much RAM is being used
If you wanted to see the activity on individual drives using something like iStat Menus. The link I gave to iStat Menus is to the macupdate.com page so you can see similar utilities in the Similar Software section oon that page.

Activity Monitor not working in Yosimite

Error Message: You can’t use this version of the application “Activity Monitor.app” with this version of OS X.
I am now running Yosimite. Activity Monitor picture not displayed on its icon either.
How do I get Activity Monitor to run and get the icon picture to display too.
ggdad

Heheh revjay, exactly :-D
@ Leinie: When you install any new software or updates, then it's always a good idea to repair permissions, so you will have a "clean" system afterwards.
Repairing permission also solves quite a lot of issuses with applications i.e. if they tend to hang, or crash. So this should always be one of the first things you do when something is not doing as it should on your mac.
Glad that it works now

Activity Monitor not opening???

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