MXI-4 RX-TX Lights Flash continuously

I have a relatively new NI PXI-PCI8336 MXI-4 system I am troubleshooting. The system user a fiber connection in a PXI-1042Q chassis. This is identical to two other systems we have put into service, but I'm having some intermittent communications issues here. One thing we've noticed that with this installation the Rx and Tx lights begin flashing immediately and continuously when our PC boots, whereas on the others these only flash when we have application software to communicate with daughter boards running. I curious if there's a sense if this communication on bootup is normal behavior for the MXI-4 and how to evaluate communication at bootup? Thanks.
Tony

Tony,
You should expect Tx/Rx flashes when you power on the PC, during BIOS POST, and several times during Windows boot.  These will usually be small bursts as things are configured.  Once you've logged in and finished with all the device installation prompts it will usually be quiet until you launch application software.
Because PCI uses shared interrupts, there are times when something in the chassis will share an interrupt with something else that generates interrupts periodically or sporadically.  When any device asserts an interrupt, the OS will call interrupt handlers for all devices that share that interrupt, and the interrupt handlers will check their hardware to see if it needs service (thus flashing the Tx/Rx lights).  I had a system where Tx/Rx blinked every second when the chassis was idle because something on the motherboard was periodically interrupting.  It didn't cause any real harm, other than annoying me.
 Does that sound like what you're seeing?  Have you tested the system with a different model PC?  You could try with a single board in the chassis to see if you're getting the traffic, and test the board in four adjacent slots (4 tests that differ only in where you put the card).  Use sequential slots on the PXI-1042Q, because the four interrupt pins are rotated between slots.  That way you'll test the card with every interrupt line in the chassis and see if that's what causes the traffic.
- Robert

Similar Messages

  • Tv screen only says ITunes and light flashes continually. Can't use.

    Tv screen only says ITunes and light flashes continually. Can't use the system.

    It is telling you to connect to iTunes via micro usb, as it needs to be restored
    Apple TV (2nd and 3rd generation): Restoring your Apple TV - Apple Support

  • Please help: iMAC doesn't recognize TC.  Amber light flashes continuously

    This is my second day trying to install Time Capsule. Some background: I have an Arris brand Comcast cable modem. Internet service is fine when I connect the modem directly to the iMac, but not when I run it through Time Capsule. Air Port utility scan comes back saying it can't locate a wireless device. I've double and triple checked all cable and power connections. In addiion I've installed and reinstalled the Time Capsule software, with no effect. I also followed the following steps:
    1. Unplugged the power cable from the TC
    2. Unplugged the cable modem and hit the reset button
    3. Waited more than 2 minutes
    4. Connected ethernet cable to modem; and to iMac
    5. Restored poser to modem
    5. Restored power to TC
    Still no effect: iMac doesn' recognize TC
    I also bypassed the modem and directly connected the iMac to the TC. Light continues to flash amber. I also turned on Time Machine from the dock. Predictably, I got an error message that the storage device oouldn't be found.
    What else can I try? Should I reset the Time Capsule, or will this just foul things up even more? Thanks.

    you need to call your ISP and have them release the DHCP lease on the mac address of your PC and allow the mac address of your TC to join the nestwork.
    You PC 's mac address currently has the DHCP lease.

  • Sleep Light flashing continuously

    All of a sudden my MacBook pro shutdown last night and the sleep light started to flash about twice a second - continuously - and the display never comes on. I tried restarting a few times but no go. I took the battery out and left it out for the night.
    This morning it started up and I started to txfer my latest iTunes purchases when it went off again. Whatever I try, be it target mode, or boot from the install CD, is not working - the display is always off and the sleep light is flashing. Are there any other tricks before I take it to the Apple store? I'd especially like to get some of my latest documents off of it.

    the sleep light started to flash about twice a second
    Does it make any 'beeps' when flashing ?
    http://docs.info.apple.com/article.html?artnum=%20303083
    http://docs.info.apple.com/article.html?artnum=58442

  • What is wrong with apple tv when the blue light flashes quickly

    I am having trouble with my apple tv device.  The blue light flashes continuously and will not reset at all.

    Welcome to the Apple Community.
    You might try restarting the Apple TV by removing ALL the cables for 30 seconds.

  • Express Amber light flashing

    I have "installed" the Airport Express to my wireless network. However, the amber light flashes continuously no matter what. It has never established a green light. It shows up separately from the "network" through my Airport Extreme and does not work simultaneously with my network to allow me access to both the internet and iTunes through my stereo. What am I doing wrong?

    Simple answer - the network isn't set up properly. Though it wasn't 100% clear from your message, I am going to assume you already had a working wireless network with an Airport Extreme Base Station.
    Get everything back to a known state:
    1. Unplug your Airport Express from power.
    2. Run the Airport Admin Utility, select to view the configuration of your Airport Extreme Base Station. Under the Airport tab, make sure the box next to "Create a closed network" is NOT checked. Under the Access Control tab, make sure there are NO entries in the table shown. Under the WDS tab, make sure all fields are blank, no boxes are checked, no table entries are made. Update settings to your Base Station.
    3. Do a factory reset of your Airport Express per:
    http://docs.info.apple.com/article.html?artnum=108044
    To set up your network:
    1. Plug your laptop, Base Station, and Airport Express into power, all in the same room (for now). Make sure the laptop is able to access the internet via the Base Station.
    2. Run the Airport Setup Assistant. Use its guidance to configure your Airport Express as a new base station that "joins" the existing wireless network created by the Airport Extreme Base Station.
    That's it!

  • Status light flashes. Apple on TV.

    Been using Apple TV more frequently lately.  All of a sudden status light flashing continuously and an apple on the screen.  I have unplugged everything for an hour and still no luck.  held down menu button and other buttons...no luck.  Please help so we can watch Apple TV again!  Do I need to "reboot"?  If so, how!

    Hello Kardsy,
    The links below detail how to restore both the 1st generation Apple TV and the 2nd and 3rd generation Apple TVs.
    Apple TV (1st generation): How to perform a factory restore
    http://support.apple.com/kb/HT3199
    Apple TV (2nd and 3rd generation): Restoring your Apple TV
    http://support.apple.com/kb/HT4367
    Cheers,
    Allen

  • HT204400 Light is flashing continueously on the front of the apple tv. No picture and no sound. Does anyone know what is wrong? Everything is plug in correctly. When I disconnect everything and re plug it in the apple icon comes up, but then blank screen

    Light is flashing continueously on the front of the apple tv. No picture and no sound. Does anyone know what is wrong? Everything is plug in correctly. When I disconnect everything and re plug it in the apple icon comes up, but then blank screen with no sound and no picture. Does anyone know what is wrong?
    l have an apple tv  2 generation please help me

    Welcome to the Apple Community.
    If your problem persists get yourself a micro USB cable (sold separately), you can restore your Apple TV from iTunes:
    Remove ALL cables from Apple TV. (if you don't you will not see Apple TV in the iTunes Source list)
    Connect the micro USB cable to the Apple TV and to your computer.
    Reconnect the power cable (only for Apple TV 3)
    Open iTunes.
    Select your Apple TV in the Devices list, and then click Restore.
    (You may already have a micro USB cable if you have a camera or other digital device)

  • Hp psc 2110 all-in-one -best, normal fast lights just flash continually

    My hp psc 2110 all-in-one I have had for a number of years and has never let me down before.
    The problem started when I tried to print from a PC on my home network. The request was on the queue but wouldn't print and the 3 lights for Best, Normal  and Fast Quality just flash continually.
    I also keep getting a window come up entitled HP OFFICEJET REFLASH asking for the original setup disk.
    I have responded and put the CD in the drive.
    I have uninstalled the program and reinstalled a download from HP.com website but still the lights continue to flash.
    Can anyone help PLEASE!!!!!
    Best regards
    The Mole
    [email removed for privacy reasons]

    My hp psc 2110 all-in-one I have had for a number of years and has never let me down before.
    The problem started when I tried to print from a PC on my home network. The request was on the queue but wouldn't print and the 3 lights for Best, Normal  and Fast Quality just flash continually.
    I also keep getting a window come up entitled HP OFFICEJET REFLASH asking for the original setup disk.
    I have responded and put the CD in the drive.
    I have uninstalled the program and reinstalled a download from HP.com website but still the lights continue to flash.
    Can anyone help PLEASE!!!!!
    Best regards
    The Mole
    [email removed for privacy reasons]

  • Does anyone know about how to get the blue light @ the top of the left corner of the Samsung Galazy 3 to quit flashing continuously?

    Does anyone know about how to get the blue light @ the top of the left corner of the Samsung Galazy 3 to quit flashing continuously?

    It would appear you have some sort of notification set up and have yet to look at the app which is sending the notification to the phone.
    You would have to first determine which app is sending the notification and then change the settings in that app to disable notifications if you no longer want to be alerted by that app.

  • Apple TV loses picture output and status light flashes rapidly after 5 minutes hooked up via HDMI - DVI cable

    Apple TV connected to a 2005 50" plasma monitor with DVI input via belekin HDMI to DVI cable.  Unit worked perfectly long enough to get it connected to the wireless network and begin the itunes registration process when there was a loss of signal message on the screen from the monitor and the Apple TV status light flashed rapidly and continuously. Reset and reboot yeilded flashing rapid status light and no output detected from the monitor.  I contacted support online and was told to return the unit to the apple store.  I returned home with another brand new apple tv and connected it in the same manner with exactly the same results.  Is there something with the HDMI - DVI interface that is causing this?  Are there known issues with the HDMI - DVI connection to Apple TV with older plasma monitors?

    The Apple TV doesn't actually support DVI. Some have managed to get it to work others have had varying issues with it.

  • Sleep light flashes 5 times - no beeps. What does it mean?

    I have a white 2008 Macbook 2.4 Ghz. I recently installed 10.6 from scratch via Retail DVD and the Macbook worked fine. I updated via Software Update and installed all the updates that appeared. There was also a Firmware update to install, which I did after the update to 10.6.8.
    But since then, the Macbook has serious video problems.
    It boots okay, but the sequence is now:
    - front sleep light flashes 5 times; there are no error beeps
    - I hear the startup chime
    - the Apple logo and spinning wheel appear, and bootup continues
    - at the point where the screen goes blue, and would normally boot to the desktop, the screen now goes black and the Macbook appears to go to sleep
    If I wait for a couple of minutes, when I press a key to wake the Macbook from sleep: the DVD spins up, the sleep light flashes 5 times, and I now see the desktop. But then the screen goes black after about 10 seconds.
    Before the screen goes black, I can see that the boot seems to have completed okay. I have a Wifi connection and the date and time are correct.
    If I go really fast, I can move the arrow to the Apple icon in the top bar and choose Shut down or Restart.
    I can boot from the internal HD, an external FW HD and an Install DVD.
    I can hold down the Option key and I get all the bootable volumes to boot from. I can choose any of them, then start the boot process, but at the same point - the blue screen - the screen goes black and the Macbook goes to sleep.
    The Macbook works perfectly fine when connected to an external monitor. In the Display preferences, only the external monitor is available. The Macbook monitor is not listed. As well, iSight and Photo Booth report that no camera is connected.
    I've found some info on the Apple site re. the 5 sleep light flashes, but it only refers to the Macbook Air, and indicates a problem with the battery.
    Has anyone seen this problem with the Macbook?

    From EZ Jim's link, there was another link to this info at the Apple site, re. Power on Self-Tests:
    The power on self-test resides in the ROM of the computer. This test runs whenever the computer is turned on after being fully shut down (the power-on self-test does not run if the computer is only restarted).
    If a fault is detected during the test, you will not hear a normal startup chime. Instead, the system will beep as explained below. If you experience one of these beeps, you may call your Apple Authorized Service Provider for additional troubleshooting assistance.
    1 beep = no RAM installed
    2 beeps = incompatible RAM types
    3 beeps = no good banks
    4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
    5 beeps = processor is not usable
    In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
    As I wrote, I don't get the Error Beeps. I've had these on other Macs, so I know what they are. Here, I only get the LED flashes.
    What is interesting above is that they say that the Power LED will flash a corresponding number of times (as the beeps) PLUS ONE. In my case, then, if I got 5 flashes, then might it mean NO GOOD BOOT IMAGES IN THE BOOT ROM?
    Anyway, it doesn't seem to have the flashing LED problem any more. No idea where to go from here.

  • Satellite A500 - Battery light flashes when connected to mains power

    Win 7 Satellite A500 PSAM3A-03P00E.
    The battery light flashes when connected to mains power (intermittent fault), when I unplug mains and re-connect flashing stops and battery (high capacity) continues to charge.
    Also when battery light flashes the key board back lighting stays on when it should blank out and if the back lighting is off and the battery light starts flashing the key board back lighting doesn't turn on, all other functions seem to work fine.
    The battery charges and holds charge as it should (when light flashes battery doesn't charge).

    Hi
    Did you notice this issue from first day of purchase?
    Theoretically it could be possible that your battery starts to malfunction
    At the other hand an electronic issue might be possible too
    However, try this:
    Remove ac adaptor and battery. Then press and hold power buttons 30 sec long.
    Then insert the battery and connect AC adaptor again does it helps?
    By the way: is BIOS up to date? If not, perform an update.

  • Battery light flashes when connected to mains, (intermittent fault) battery in good condition.

    Win 7 Satellite A500 PSAM3A-03P00E. The battery light flashes when connected to mains power (intermittent fault), when I unplug mains and re-connect flashing stops and battery (high capacity) continues to charge. Also when battery light flashes the key board back lighting stays on when it should blank out and if the back lighting is off and the battery light starts flashing the key board back lighting doesn't turn on, all other functions seem to work fine. The battery charges and holds charge as it should (when light flashes battery doesn't charge).
    Solved!
    Go to Solution.

    All fixed, the earth contact in the power jack was bent down allowing intermittent contact and limiting current. I bent the contact back up to where it should be and all is good.

  • Macbook air camera light flashing on resume?

    Hi guys, my Macbook air (11 inch, mid 2011) has recently had its facetime camera light flashing on resume when I open the macbook lid. The time period when it flashed varies, but I am worried about security, and if someone has access to the camera.

    1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve your problem.
    2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
    3. Below are instructions to run a UNIX shell script, a type of program. All it does is to gather information about the state of your computer. That information goes nowhere unless you choose to share it on this page. However, you should be cautious about running any kind of program (not just a shell script) at the request of a stranger on a public message board. If you have doubts, search this site for other discussions in which this procedure has been followed without any report of ill effects. If you can't satisfy yourself that the instructions are safe, don't follow them.
    Here's a summary of what you need to do, if you choose to proceed: Copy a line of text from this web page into the window of another application. Wait for the script to run. It usually takes a couple of minutes. Then paste the results, which will have been copied automatically, back into a reply on this page. The sequence is: copy, paste, wait, paste again. Details follow.
    4. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
    5. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply.
    6. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking  anywhere in the line. The whole line will highlight, though you may not see all of it in your browser, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
    Triple-click anywhere in the line of text below on this page to select it:
    PATH=/usr/bin:/bin:/usr/sbin:/sbin; clear; Fb='%s\n\t(%s)\n'; Fm='\n%s\n\n%s\n'; Fr='\nRAM details\n%s\n'; Fs='\n%s: %s\n'; Fu='user %s%%, system %s%%'; PB="/usr/libexec/PlistBuddy -c Print"; A () { [[ a -eq 0 ]]; }; M () { find -L "$d" -type f | while read f; do file -b "$f" | egrep -lq XML\|exec && echo $f; done; }; Pc () { o=`grep -v '^ *#' "$2"`; Pm "$1"; }; Pm () { [[ "$o" ]] && o=`sed -E '/^ *$/d;s/^ */   /;s/[-0-9A-Fa-f]{22,}/UUID/g' <<< "$o"` && printf "$Fm" "$1" "$o"; }; Pp () { o=`$PB "$2" | awk -F'= ' \/$3'/{print $2}'`; Pm "$1"; }; Ps () { o=`echo $o`; [[ ! "$o" =~ ^0?$ ]] && printf "$Fs" "$1" "$o"; }; R () { o=; [[ r -eq 0 ]]; }; SP () { system_profiler SP${1}DataType; }; id | grep -qw '80(admin)'; a=$?; A && sudo true; r=$?; t=`date +%s`; clear; { A || echo $'No admin access\n'; A && ! R && echo $'No root access\n'; SP Software | sed '8!d;s/^ *//'; o=`SP Hardware | awk '/Mem/{print $2}'`; o=$((o<4?o:0)); Ps "Total RAM (GB)"; o=`SP Memory | sed '1,5d; /[my].*:/d'`; [[ "$o" =~ s:\ [^O]|x([^08]||0[^2]8[^0]) ]] && printf "$Fr" "$o"; o=`SP Diagnostics | sed '5,6!d'`; [[ "$o" =~ Pass ]] || Pm "POST"; p=`SP Power`; o=`awk '/Cy/{print $NF}' <<< "$p"`; o=$((o>=300?o:0)); Ps "Battery cycles"; o=`sed -n '/Cond.*: [^N]/{s/^.*://p;}' <<< "$p"`; Ps "Battery condition"; for b in Thunderbolt USB; do o=`SP $b | sed -En '1d; /:$/{s/ *:$//;x;s/\n//p;}; /^ *V.* [0N].* /{s/ 0x.... //;s/[()]//g;s/\(.*: \)\(.*\)/ \(\2\)/;H;}; /Apple|SCSM/{s/.//g;h;}'`; Pm $b; done; o=`pmset -g therm | sed 's/^.*C/C/'`; [[ "$o" =~ No\ th|pms ]] && o=; Pm "Thermal conditions"; o=`pmset -g sysload | grep -v :`; [[ "$o" =~ =\ [^GO] ]] || o=; Pm "System load advisory"; o=`nvram boot-args | awk '{$1=""; print}'`; Ps "boot-args"; d=(/ ""); D=(System User); E=; for i in 0 1; do o=`cd ${d[$i]}L*/L*/Dia* || continue; ls | while read f; do [[ "$f" =~ h$ ]] && grep -lq "^Thread c" "$f" && e=" *" || e=; awk -F_ '!/ag$/{$NF=a[split($NF,a,".")]; print $0 "'"$e"'"}' <<< "$f"; done | tail`; Pm "${D[$i]} diagnostics"; done; [[ "$o" =~ \*$ ]] && printf $'\n* Code injection\n'; o=`syslog -F bsd -k Sender kernel -k Message CReq 'GPU |hfs: Ru|I/O e|last value [1-9]|n Cause: -|NVDA\(|pagin|SATA W|ssert|timed? ?o' | tail -n25 | awk '/:/{$4=""; $5=""};1'`; Pm "Kernel messages"; o=`df -m / | awk 'NR==2 {print $4}'`; o=$((o<5120?o:0)); Ps "Free space (MiB)"; o=$(($(vm_stat | awk '/eo/{sub("\\.",""); print $2}')/256)); o=$((o>=1024?o:0)); Ps "Pageouts (MiB)"; s=( `sar -u 1 10 | sed '$!d'` ); [[ s[4] -lt 85 ]] && o=`printf "$Fu" ${s[1]} ${s[3]}` || o=; Ps "Total CPU usage" && { s=(`ps acrx -o comm,ruid,%cpu | sed '2!d'`); o=${s[2]}%; Ps "CPU usage by process \"$s\" with UID ${s[1]}"; }; s=(`top -R -l1 -n1 -o prt -stats command,uid,prt | sed '$!d'`); s[2]=${s[2]%[+-]}; o=$((s[2]>=25000?s[2]:0)); Ps "Mach ports used by process \"$s\" with UID ${s[1]}"; o=`kextstat -kl | grep -v com\\.apple | cut -c53- | cut -d\< -f1`; Pm "Loaded extrinsic kernel extensions"; R && o=`sudo launchctl list | awk 'NR>1 && !/0x|com\.(apple|openssh|vix\.cron)|org\.(amav|apac|calendarse|cups|dove|isc|ntp|post[fg]|x)/{print $3}'`; Pm "Extrinsic system jobs"; o=`launchctl list | awk 'NR>1 && !/0x|com\.apple|org\.(x|openbsd)|\.[0-9]+$/{print $3}'`; Pm "Extrinsic agents"; o=`for d in {/,}L*/Lau*; do M; done | grep -v com\.apple\.CSConfig | while read f; do ID=$($PB\ :Label "$f") || ID="No job label"; printf "$Fb" "$f" "$ID"; done`; Pm "launchd items"; o=`for d in /{S*/,}L*/Star*; do M; done`; Pm "Startup items"; o=`find -L /S*/L*/E* {/,}L*/{A*d,Compon,Ex,In,Keyb,Mail/B,P*P,Qu*T,Scripti,Servi,Spo}* -type d -name Contents -prune | while read d; do ID=$($PB\ :CFBundleIdentifier "$d/Info.plist") || ID="No bundle ID"; [[ "$ID" =~ ^com\.apple\.[^x]|Accusys|ArcMSR|ATTO|HDPro|HighPoint|driver\.stex|hp-fax|\.hpio|JMicron|microsoft\.MDI|print|SoftRAID ]] || printf "$Fb" "${d%/Contents}" "$ID"; done`; Pm "Extrinsic loadable bundles"; o=`find -L /u*/{,*/}lib -type f | while read f; do file -b "$f" | grep -qw shared && ! codesign -v "$f" && echo $f; done`; Pm "Unsigned shared libraries"; o=`for e in DYLD_INSERT_LIBRARIES DYLD_LIBRARY_PATH; do launchctl getenv $e; done`; Pm "Environment"; o=`find -L {,/u*/lo*}/e*/periodic -type f -mtime -10d`; Pm "Modified periodic scripts"; o=`scutil --proxy | grep Prox`; Pm "Proxies"; o=`scutil --dns | awk '/r\[0\] /{if ($NF !~ /^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./) print $NF; exit}'`; Ps "DNS"; R && o=`sudo profiles -P | grep : | wc -l`; Ps "Profiles"; f=auto_master; [[ `md5 -q /etc/$f` =~ ^b166 ]] || Pc $f /etc/$f; for f in fstab sysctl.conf crontab launchd.conf; do Pc $f /etc/$f; done; Pc "hosts" <(grep -v 'host *$' /etc/hosts); Pc "User launchd" ~/.launchd*; R && Pc "Root crontab" <(sudo crontab -l); Pc "User crontab" <(crontab -l | sed 's:/Users/[^/]*/:/Users/USER/:g'); R && o=`sudo defaults read com.apple.loginwindow LoginHook`; Pm "Login hook"; Pp "Global login items" /L*/P*/loginw* Path; Pp "User login items" L*/P*/*loginit* Name; Pp "Safari extensions" L*/Saf*/*/E*.plist Bundle | sed -E 's/(\..*$|-[1-9])//g'; o=`find ~ $TMPDIR.. \( -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 \) | wc -l`; Ps "Restricted user files"; cd; o=`SP Fonts | egrep "Valid: N|Duplicate: Y" | wc -l`; Ps "Font problems"; o=`find L*/{Con,Pref}* -type f ! -size 0 -name *.plist | while read f; do plutil -s "$f" >&- || echo $f; done`; Pm "Bad plists"; d=(Desktop L*/Keyc*); n=(20 7); for i in 0 1; do o=`find "${d[$i]}" -type f -maxdepth 1 | wc -l`; o=$((o<=n[$i]?0:o)); Ps "${d[$i]##*/} file count"; done; o=$((`date +%s`-t)); Ps "Elapsed time (s)"; } 2>/dev/null | pbcopy; exit 2>&-
    Copy the selected text to the Clipboard by pressing the key combination command-C.
    7. Launch the built-in Terminal application in any of the following ways:
    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
    ☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
    Click anywhere in the Terminal window and paste (command-V). The text you pasted should vanish immediately. If it doesn't, press the return key.
    If you see an error message in the Terminal window such as "syntax error," enter
    exec bash
    and press return. Then paste the script again.
    If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know your password, or if you prefer not to enter it, just press return three times at the password prompt.
    If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
    The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line "[Process completed]" to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report your results. No harm will be done.
    8. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
    If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
    When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
    Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
    Copyright © 2014 Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Terms of Use of Apple Support Communities ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

Maybe you are looking for