MacBook Pro :: How To Remove The Cpu Usage Limit
Apr 10, 2012
I have to run a C program on terminal as fast as possible. However, there seems to be a cpu usage limit for the terminal, the program supose to run around 15 seconds on a linux machine with similar configuration where cpu usage is at 85-95%. But, it runs one minute on my macbook pro with cpu usage less than 15%. Finally, my question is, how do I utilize all of the 85% idle cpu for this program or at least most of the idle cpu?
Info:
MacBook Pro, Mac OS X (10.7.3)
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Oct 5, 2008
what i want is to be able to limit skype to use 20kbps or something like that, if its even possible. there are no guides on google, nor any programs that i can use.
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Oct 17, 2009
I live in a hall at a university and they ban anyone who uses more than 5gb of bandwidth in a day. 48h first time. 14 day for the second time, and then forever.... I was banned for the first time 5 min ago and I realized a badly need a software that alerts me when I get to, let's say, 4gb and then stops the network when I get close to the limit. I wasn't able to find such an application for mac os x
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Jun 20, 2008
At the moment i'm sharing a house while waiting for some prety serious repair work to be done on mine. therefor im sharing an ADSL line, but its only 568Kbps (ish) and i dont want to use more than my fair share of the somewhat limited bandwidth. Dose anyone know of an app that i can use on my iMac to set a maximum upload and download speed for my connection.
ADSL line -to- BT Voyager Wifi router -to- 1x LAN XP pc and 1x Wifi Vista PC and 1x imac in sig
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Jun 3, 2010
This is pretty much what the title states... I have the first generation macbook with the intel processor, and I was wondering why there is a limit on the amount of RAM I can put in? I have maxed it out to 2gb at the moment, and whilst I don't desperately need 4gb, i would be nice to have a faster macbook if I wanted one.
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Sep 8, 2009
Just a quick question. I know when upgrading the RAM on my macbook, even if I put in 4BG it would only use 3.6 or something like that. Is there anything like this when upgrading the hard drive? Can I put in as many GB of hard drive memory as I want or has apple put limitations on that as well?
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Dec 15, 2009
I'm planning to upgrade my 17" MPB soon (trying to hold on for Arrandale, but we'll see how the old one holds up). Not that it will make much difference in my decision, but does anyone know if the 8GB RAM limit in the current MBPs is due to the fact that the largest currently-available DIMMs that will fit in the MBP are 4GB each; or if it's due to a limitation in the way the computer/chipset addresses the memory? In other words, once someone develops an 8GB DIMM that will fit in the MBP's slots, will it be possible to upgrade to 12 or 16GB of RAM?
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Aug 11, 2008
I've searched a lot about MacBook (not Pro) overheating. I found some cooling pads, but i'm not certain if I need it.
So, my question is: from which temperature should I start to get anxious?
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Jul 9, 2010
I recently upgraded my MBP's HDD and RAM. The HDD upgrade from 200GB 5400 to 320GB 7200 when great, however, I installed 4GB of matched RAM and only 3GB show up. The sticks are 2GB DDR2 667MHz. When I install 3GB (1GB & 2GB Sticks), only 2GB show up. I understand some MBP's have a 3GB limit, however, Apple told me the limit on my MBP is 4GB's. I also tried 2 different brands of 4GB sticks (2X2GB)
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May 30, 2012
The specifications, for MacBook Pro, mention that the operating temperature is 10 to 35 Deg C. Does it mean that MacBook Pro will not function above 35 Deg C? Is it recommended to operate MacBook Pro always in an air-conditioned environment? As I plan to buy for the 1st time, I seek an answer.
Info:
MacBook Pro
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Jun 14, 2012
I read in another post here that the new all-flash memory is only good for about 100,000 saves, or 5 years for the average computer user. Is this really true? It seems silly to promote using hardware that puts such a limit on the user..
Info:
MacBookPro
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Oct 11, 2010
Is there a limit on the storage capacity that a 2007 MacBook can use? Also would a 12.5 mm high drive fit?
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Mar 29, 2010
Coconut Battery is showing that I only have about half of my original battery max limit left, but now I'm getting a message that says "Service Battery" when I check battery info from the icon on the top of the screen. Anything at all I can do at this point, short of buying a new battery?
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Feb 7, 2012
I'm looking to upgrade my internal hard drive, is there a limit on the size I can upgrade to? I have a 150G drive, and I'm running out of space. I'm thinking about going for the gold, and getting a 1T?
Info:
MacBook, Mac OS X (10.7.2), 2.2 GHz Intel Core 2 Duo-4G Ram
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Jun 8, 2012
I created a second account on my Macbook, have parental controls on to limit, "adult material," however when i go onto that user name the safari shows up with a "?" and wont allow me to even access safari. I double checked to make sure I have allowed the user to use the internet. what am i doing wrong?
Info:
Mac Pro, Mac OS X (10.5.8)
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Aug 31, 2010
i just got my brand new macbook pro 15" 2.66 ghz i7, 4 gb ram, high res, 500 gb 7200 rpm hdd, and I am ecstatic this computer is SO fast it blow my mind all over the table, the question i have is about the SD card slot, is there limit on data transfer for the SD card slot or is it limited by the speed of the card? i have a 16 GB sandisk extreme 2 that transfers @ 15 mb/s and a 4 GB sandisk extreme 3 that transfers @ 30 mb/s so can i transfer at those speeds or is it buffered? i tried importing 1 GB i had on the slower card and it transferred extremely fast but i cannot remember how fast the usb 2.0 was because i never really paid much attention.
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May 26, 2012
When I sign in iCloud, a warning says Account Limit Reached. What does that mean and now what?
Info:
MacBook Pro, Mac OS X (10.7.4)
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Sep 17, 2009
I have an iStat Menubar and it's constantly showing me 40% CPU usage. It also shows the same number in Activity Monitor. However, when I look at the processes running, they don't add up to 40. In fact, they only amount to around 6% or so. I did click "All Processes", but nothing was running that would cause it to be 40%.
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May 10, 2009
I've been trying and trying to get my 2007 Macbook C2D to run cooler. It idles at about 60-65 C even with no CPU usage (verified through Activity Monitor etc) and it used to get up to 95+ when playing any sort of video (Youtube etc) which would cause playback stuttering and other problems after 15-20 minutes.
I've tried a number of techniques to drop the temperature, most recently undervolting with Coolbook. Interesting, these have been relatively successful at lowering the *peak* temperature-- videos now only bump the CPU temp up to 70 C or so-- but it still idles at the exact same temperature it did before, around 60.
Does anyone have any theories why the idle temperature would remain high even after I've reduced the peak temperature, and even when CPU usage is hovering between 2 and 5 percent?
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Nov 20, 2009
I am new to mac, and I have a macbook pro 15" 2009 model.
I am currently running a program (Mprime) that uses all the spare cpu on the mac. So that I am always running on 100%.
Do this extensive usage of CPU shorten the lifespan/quailty of the Mac/Fan/Battery?
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Jun 5, 2010
when doing high processor use tasks like copying 5 gb files or playing hl2 on steam the processor use always stays below 50% (istatpro)
1) why is this the case ?
2) if i could use more processor time would it improve performance of high use tasks?
3) if this is not normal behavior what could cause this ?
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Feb 1, 2012
I have a two week old MBP and I find that my battery performance is dismal.I'm only getting 2 hours per charge, and this is after Apple replaced my battery two days ago!I think it might be related to my CPU usage..Looking at Activity Monitor, my "% User" CPU usage is routinely above 26%, with only Safari running (no videos). Even with no programs open I run over 25%.
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Feb 6, 2012
My MacbookPro is running way too hard and makes me think it's going to die any second,I just purchased it new from the apple store back in September the CPU my Java takes up is amazing. I've seen the number jump to 102+ which makes me wonder why my computer freaks out when I use java. I've included a picture of the CPU usage.                                                                                                                                              Â
Info:
MacBook
Pro, Mac OS X (10.7.3)
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Jun 1, 2014
I have a MacBook Air Late 2010, and the fan over heats at around 30% CPU usage, I installed AppTamer to keep it down, but it is quite annoying to keep using it. Sometimes the fan will go at 18% when one application uses about 15%, but not 100% percent when its lots of other ones. App that generaly cause the fan to overheat are, obviously, high CPU ones, like Pixelmator, Photoshop, Xcode, but some times even low CPU usage, like YouTube or Video Content on Google Chrome, Safari and Google Chrome in general. Microsoft Office 2011, Pages, Numbers & Keynote. Even apps like Preview (viewing more than 5 photos ) can use alot of CPU. So what should I do? I have repairs under warranty till about September, but Apple charge £35.00 to chat online?!?! I have tried resetting the SMC which only works about half of the time. I read on the internet that it is a production issue or at least common Late 2010 MacBook Air's.
Info:
MacBook Air, OS X Mavericks (10.9.3)
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Dec 4, 2010
I'm debating between an air and a mbpro. I'll mostly use this for internet, excel, and iphoto. Is 4gb going to be enough for these uses? I have an iMac with 8gb and it really screams. How much better is the screen on the mba? I played with both at the apple store and I didn't really notice a difference? I do like the air since it was just updated. I figure if the mbpro's came out with something really cool i could sell and wouldn't be out that much money.
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Jan 18, 2009
I've been monitoring the CPU temperatures on my 2 week old alu macbook frequently, and it always hovers at ~42 degrees celsius. However, today something odd happened, all of a sudden the computer was getting noticeable hotter (the fans remained off though), when I checked CPU temp it was up to 72 degrees. I checked with "Activity Monitor" and nothing was using up more than 2% CPU. Then I saw through iStatPro that system CPU usage was at 40%. What the hell? Its usually at 2-5%...i.e. always. After restarting, the system cpu usage was back down to 2% and the temperature slowly dropped back to its norm.
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Apr 8, 2009
My MBA (Ver A 1.6) just started getting the "sluggish" symptoms. Started noticing that my CPU gets stuck at 90~100% after about 30 min of use, since about a week ago. I keep restarting the computer and after about 30 min, my MBA becomes very sluggish and iStat shows both CPU bars all the way to about 100%.
When this happens, the activity monitor shows the kernel_task at 125~130. This is too high, right? If it is, what's causing this? I can't imagine that any of the programs that I regularly use will cause this.
Here's the screen shot of the activity monitor.
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Aug 5, 2009
I don't know much about RAM and how it really works but here's my question: (i have new unibody 13" MBP w/ 4GB RAM) When i do a fresh restart i have anywhere up to 2.5-3GB free with basically NO applications open. But as time passes, web browsing, sleep, etc the amount of free RAM available goes down to <2GB even when i exit all apps...
1. Is this typical? What's the explanation for RAM being eaten up over time? Is it advisable to do a fresh restart every couple days or so just to free up RAM again?
2. Is it even common with 4GB of RAM for half (2GB) of it to be used all the time? (I'm guessing yes, but just wondering what's the explanation) For those who only have 2GB of RAM, do they always have 1GB being used? Or would even those 2GB's always be taken up?
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Apr 20, 2010
After owning many computers i approached macs buying last generation of 15' powerboks and found my best user experience.
Then i made the mistake of buying an Imac24. It's another great machine but i found out that i'm one of those who like to have all in one computer, less problems you don't need to install the same apps in two places or sync itunes etc.
So after reading Waiting for arrandale thread i'm here wainting the delivery of a glossy HiRes 8gb ram MBP '15 i5 2,4ghz.
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Jul 23, 2010
I've noticed that my macbook pro has been using a lot of RAM. I haven't really witnessed a slowdown on my computer b/c of any sort of shortage of RAM but I was just curious if this was typical (since this is my first mac). I have 4 GB of RAM and I often find myself with around 1-1.5 GB of free + inactive RAM. I had a linux system with 3 GB RAM before and it used between 1-1.8 GB of RAM and it seems like this system is using around 2.5-3 GB (active + wired). However, various OS X laptops in the past have functioned really well in the past with 2 GB and even 1 GB of RAM right? Is OS X just putting more processes in my RAM to speed up my system because more RAM is available OR does snow leopard just have high memory consumption?
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