How do I a SMC reset and PRAM zap?
Hi,
My MBP will go to a blue/grey screen ahortly after I try to open a browser (Safari and Firefox). I have to hold down the power button to reboot it. I'd like to do a SMC reset and PRAM zap to see if that will help solve the problem, but have forgotten how. Can someone help me out? Thanks!
Chris
SMc reset http://support.apple.com/kb/HT3964
PRAM reset http://support.apple.com/kb/HT1379
Similar Messages
-
My cpu stays on 3600 rpm. Therefore my fan's run at 4800 rpm. Did a smc reset and al the other reset. Help me please. Apple cant help. I even clean the fan.
I have tried everything you can find on the net. From unplug the cable cord to cleaning fans. Smc reset en pram reset. Eeven more. Its a Intel imac 24 inch 2009. HelpHooray, I think I found a solution.
Using terminal commands there actually is a way to force smcFanControl to set a tolerable max rpm for the CPU fan.
WARNING:
Be aware that this solution should only be used if you know what you're doing and you are absolutely sure the CPU fan on your iMac is indeed out of control.
Forcing a low max speed on a healthy CPU Fan with fully functioning sensors can seriously damage your Mac. You have been warned.
The solution:
Install smcFanControl
Go to the terminal and use these commands to regain control of your noisy iMac:
/Applications/smcFanControl.app/Contents/Resources/smc -k F2Mx -w 12c0
This will set the CPU Fan to max at 1200 rpm: (Oh yes!)
To revert to standard settings use:
/Applications/smcFanControl.app/Contents/Resources/smc -k F2Mx -w 3cf0
This will set CPU Fan to max at the default 3900 rpms
You might have noticed that the last 4 digits are the fan speed (in hexidecimal)
Other fan speeds you can try:
1100rpm = 1130
1500rpm = 1770
3900rpm = 3cf0
Now all I need is a way to make the setting permanent. Anyone know how to run the above terminal command automatically on bootup? -
HT3964 SMC Reset and Battery still not charging
Few months ago my battery wont charge, I performed a SMC Reset and the battery gets to work fine again. Recently the battery is not charging again right after a long period of inactivity when the macbook air was not plugged or use it for months. Now is working only if it´s plugged to the electrical socket.
I have been reset the SMC on my macbook air but still my battery is not charging, it is 0% and when I disconnect the magsafe it will turn off. What else should I do?sketchbook0918 wrote:
WOW...this proves how useful this "user to user forum" is...
It is true that some posts will go unanswered for a variety or reasons. Also understand that respondents do so at their own initiative and do so gratis. If you choose to initiate your own discussion, you may find that there may be some who will solve your problem, and it will not cost you a dime. it is your choice.
Ciao. -
My USB port on my Macbook Pro stopped working and i tried the SMC reset and the one closest to the SD port still continues to not work. Is there anything i can do besides bringing it in?
I would do another SMC reset. If nothing changes you should take the computer in to an Apple store for a free diagnostic. You should make an appointment.
http://www.apple.com/retail/geniusbar/ -
SMC Reset and now No Battery / Fan on full-blast
Hello,
I have a late 2010 13" MBA. It's worked flawlessly until about a week ago when I noticed that the fan was coming on more frequently. Today, I had some spare time and read an article that suggested I do an SMC reset.
I did the SMC reset and now, my MBA's fan is on full blast, the battery has an "X" in it, and the monitoring utilities that previously showed the fan speed now don't show a fan at all. I can remove the power adapter and the machine will run off of the battery.
To be clear, all was pretty much fine with my macbook. Everything went bad after the SMC reset.
What happened?Fixed my own problem. Tried the SMC reset without the AC adapter plugged in. Hope this helps someone else.
-
2008 iMac, display not coming back after sleep, requiring SMC reset and more.
I have a 24" 2008 iMac that's recently started giving me migranes starting a couple weeks ago. It's the kids' shared computer in the bonus room, and one of them comes in and tells me it's not working. I go in, and it seems like it's off, but I can hear the fans going. Won't respond to mouse, keyboard, even hitting the power button that usually pops something up warning that I'm about to shut it down with people still logged in. So I hold the power button down to force it off, wait a minute, and turn it back on. I hear the superdrive sounding like it's trying to load a disc, but there's nothing in there . . . keeps making that noise again and again. No startup chime, no display, nothing, just the superdrive sound. Can't get it to boot. I come to the support site and go through resetting the SMC - unplugging it for 15 seconds. That at least takes care of the superdrive sound, and I get the startup chime, but no video.
I go a step further, unplugging it and plugging it back in while holding the power button down for 10 sec. When I hit the power button after that, it comes on, display nice and bright, but the fans are now running full speed. Another article tells me to reset the SMC for that, which I do, and now the fans are working properly and the system is working again.
Problem is, I wind up having to go through this whole thing every other day. If I follow the steps of unplugging it, holding the power button down while I plug it back in, turning it on and booting up, shutting down and resetting the SMC to make the fans slow down, it will work. But it's random as to when it happens, and I'd really like to know why it could be happening and what I can do to fix it for good and not have to go through the whole thing to get it back up and running. Is it simply on its last legs? Do I need to restore the OS (Snow Leopard upgrade)? Do I need to take it to the Genius Bar and pay them to look at it and diagnose it, and God knows how much to fix?
Or, do I recycle it and just bite the bullet and get a new one? Any thoughts would be greatly appreciated, thanks!
Andythe first thing to try is resetting the pram/nvram
http://support.apple.com/kb/ht1379
if this doesnt work it could be a loose display cable. -
MBP still slow after SMC reset and a fresh install.
MBP still running slow. Tried Onyx. Done a fresh install of Mountain Lion. Reverted to Snow Leopard. Done SMC reset. No significant resources in activity monitor, the top hit is safari with 296 MB and 7% CPU utilization. My best guess is a disk activity issue. I am getting a peak of 2.8 mb/sec data read (average is 300 KB/sec). Slow loading, much slower application response. Also, done with Defrag and disk permission repairs. Any suggestions?
Well it certainly appears you have thrown the entire mess at it, there is one thing left.
How to erase and install Snow Leopard 10.6
Yes I know you did this, but you make sure you do these things.
1: When you Disk Utility > Zero Secure Erase the boot drive, make sure to select the ENTIRE drive on the far left, not the indented partitions. Zeroing takes some time, but it maps off problem sectors your drive firmware may be missing.
Reducing bad sectors effect on hard drives
2: Do not restore from TimeMachine or clone as they could be corrupted, install everything fresh and test, then programs, then finally files from a external storage drive (vetted and ClamXav scan just in case)
3: Do not run Defrag or anything else, your drive will be perfectly optimized just like it is. Report the results of your drive tests etc.
If your STILL having problems after this last desperate act, your drive is likely failing and/or has ran out of spare sectors, thus can't map off anymore.
Your going to need to replace the internal drive.
Install/upgrade RAM or storage drive in Mac's
Please, let me know how it went.
Thanks. -
I have tried to do everything I can find in previous forums, ex: smc reset, removing back panel and undoing cord for a min, nothing seems to work, any ideas please.
There are no settings Readers can suggest you change for different results.
Your appointment at the Genius Bar for an evaluation is FREE, in warranty or out. These guys put their hands on these Macs all day every day, and Power and other Physical Problems is what they are good at.
Plus they have lots of spare parts they can swap around to figure out what it is doing in a hurry. -
SMC Reset and Macbook Pro Battery still not charging
Hi, I bought a new Macbook Pro the Christmas before last (2 years ago) and unfortunately didn't remember to buy the AppleCare. (Didn't have the money to purchase it as I was buying the computer) Anyway, today my charger decided to stop recharging the battery. The battery icon says the battery is charging but the LED light on the charger is not on at all and when I click on the battery status it says "Battery is Not Charging." I've already tried the usual troubleshooting and Resetting the SMC but it didn't work. I also checked the status on the battery and my computer said it was Normal. What else can I do? I really need this laptop for college and the battery has to be usable.
If available, try a different charger.
What does System Report>Power say under AC CHARGER INFORMATION?
Ciao. -
My Battery will not charge battery is at 4% now since I've purchased the new battery, When the adapter is plugged in it does not charge with the adapter or the AC cord. Any ideas what could be the problem, will I have to replace the adapter?
Model Name: MacBook
Processor Speed: 2.4 GHz
Battery Information:
Model Information:
Manufacturer: DP
Device name: ASMB013
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0000
Hardware Revision: 0000
Cell Revision: 0000
Charge Information:
Charge remaining (mAh): 217
Fully charged: No
Charging: No
Full charge capacity (mAh): 4947
Health Information:
Cycle count: 5
Condition: Normal
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 10376
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: No
Current Power Source: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0000
Wattage (W): 0
Revision: 0x0000
Family: 0x0000
Serial Number: 0x00000000
Charging: NoOpen SystemInformation (in Utilities), click 'Power' in the left Navigation panel, then at the right make a screenshot of the whole part called 'Battery Information:' and post it here, please.
I would avoid the use of DiskWarrior, at least for now.
You may also start DiskUtility and do the 'verify disk', the message at the end of the verify should end with the word 'OK'. -
When I begin to play Diablo 3 with my fairly new 15" mac book pro with retina display, every now and then my computer will be really laggy when playing it (frame rate of under 5). Normally its performance is really fast with a frame rate of about 40-60 frames per second depending on the resolution used. When this happens I have performed a SMC reset and it fixed the problem. However, every few days it will act up again and I will have to do an SMC reset again. It has now happened again for the third time and I am affraid to continue to perform an SMC reset, is this bad for my computer? Should I take it in and have them trouble shoot it? Any help would be greatly appreciated to figure out what is wrong. Thanks.
So this is what I got when I took my computer into the apple store to have it diagnosed.
After the apple technician performced several tests, the only thing that fixed the issue was an SMC reset. Based on this he figures it is probably a software or firmware issue that is going on. He is a little concerend how ever that the fans of the comupter don't reach maximal rpm when the computer is displaying the issue. So he recorded the problem, and told me to just perform the SMC reset as needed for the next couple months and wait for a new update from apple. If the issue persists I am to go back to the apple store and they will take the appropriate steps.
He said an SMC reset doesn't hurt the computer in any way, so its safe to do. I am gonna contact blizzard and let them know about the issue as well because if it is software, it could be their game (Diablo 3) that is causing the issue as well. If I hear of anything new i will let you know. So get on the blizzard form and let them know of the issue to fix the problem faster.
Thanks for your help,
Tetrault -
Macbook Air Boot failure after SMC reset. HELP.
Hi all.
So, my brand new macbook air may have encountered some water or something, i seriously dont know, but i booted it up this morning and the fan was rather loud, like seriously loud, so i check out activity monitor and the CPU usage was a solid 80% consistently even with no applications running. So i go for an SMC reset, and as i do the reset the charger falls out, literally (useless magnets), anyway i go to turn it on, and all that happens is the LED on the magsafe goes from orange to green then back to orange with no sound, no "tone", no nothing: dead silence.
Im a little concerned to take it in to an apple store as this alleged encounter with liquid that i was told about by my brother makes me fear that the LCI's will make it out of warranty.
I mean it was working fine about ten minutes ago and so surely some wierd SMC hitch cant have completely mucked up the whole thing?
Its the latest model (as in early 2014).
Thanks in advance
BillyTry a PRAM reset. If that doesnt work, reboot back into that same recovery partition and reinstall the OS, you can use either your old disk or an internet recovery. You will most likely loose your data however so you may want to try and back it up. You can do so through another Mac computer with either an ethernet/firewire cable and an app called "Migration Assistant".
Here are a couple articles that may help:
PRAM Reset: http://support.apple.com/kb/HT1379
Using disc utility: support.apple.com/kb/HT1782
OSX Recovery: www.apple.com/osx/recovery/
Migration Assistant: support.apple.com/kb/HT3322
Regards,
Cody -
Tried suggested steps for SMC reset and battery still not charging. Mac is not remembering preferred networks and won't access the internet. Any suggestions?
Reinstall Leopard.
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger, Leopard or Snow Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update. -
Macbook Pro (early 2007) screen backlight problem (fixes temporarily with smc reset)
Hi all. Maybe someone can help.
My Macbook Pro was one of the units afflicted with the videochip/logic board thermal paste issue and Apple replaced the logic board a year ago.
I am having an issue that I can't figure out (I had the same exact issue a few months ago and it resolved after several smc resets)....
My screen backlight will flicker and then go out completely about 3 minutes after booting up. The ONLY way to get the light back on is to remove the battery, do an SMC reset and then it will work again perfectly....for about 3 minutes.....
The display is there....just not backlit... Also, once or twice the computer booted itself into safe mode (I presume, because it said there was no wireless hardware)
I have tried SMC resets, pram resets, shutting down, going into and out of sleep, etc....
Has anyone else seen this problem?
I am confused by someone I know saying it could either be the inverter or inverter cable or the logic board. I say this because the computer will reset itself (albeit for only 3 minutes each time) and the backlight will work perfectly (again for only 3 minutes) after an smc reset....every single time.
Any ideas?
p.s.....when this happened before and again this time, the computer was in extended sleep mode in my travel bag.....
Thanks for any answers and please let me know if you need more info......(oh, I mentioned that it had the logic board previously replaced because when I called Apple they were ADAMANT that it couldn't possibly be the same issue since all afflicted boards were replaced with newly made parts....) just thought i'd throw that out there.....and the prior logic board issue didn't affect the backlight, but I did have the wonky graphics/lines/etc. That's NOT the problem now.....
-
Keyboard Backlight not working after SMC reset
I have a Late 2009 MacBook Pro, and I noticed that the backlight for my keyboard stopped working last night. I Performed an SMC reset and powered the computer back up. Again the backlight never came on, but I noticed that if I pressed the keyboard brightness buttons the icon that used to show on the screen showing what the brightness is at, (like the volume one), was not showing up anymore. I checked the keyboard settings and noticed that the auto brightness for the keyboard dissapeard. Anyone have any suggestions?
try to reinstall your firmware, im having the similar problems, but reinstalling wont let me.... http://support.apple.com/kb/HT1237
Maybe you are looking for
-
Accessing External Hard Drive on PC
I have my airport extreme connected to my PC via ethernet and connected wirelessly to my Mac Book. I cannot connect to the external hard drive through my PC. Whenever I enter my base station password I keep getting an error message that the user is n
-
How to specify a unique integer for each local variable defined in TestStand?
I have a .net application that reads all TestStand local variables, but for the .net application each local variable should have a unique integer number. Iterating through the locals and storing the index is not a good solution, because if a local va
-
How do I get my music off a laptop on to iPad
How do I get my music from ex hard drive or laptop onto my new iPad?
-
How to select the row on right click.
Hi, I want row selection when user right click on the table. Right now when user right click on table a pop up menu comes but no row selected at this time. Can any body tell how select the row when right click over the table.
-
After freeing space using disk utility, I can't return 80GB of inaccessible space back to normal.
I was planning on freeing some space suing disk utility from Macintosh HD so I can make the BOOTCAMP partition bigger. Obviously I haaven't put much preparation into it before I headed off recklessly into the unknown. After getting free space I moved