Questions dealing with performance of Apple hardware or software, especially about troubleshooting or improving poor performance.

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Mac has become insanely slow : Processes SystemUIServer, UserEventAgent and loginwindow using a lot of memory

I have been using my Mac for for many months without any problem. But recently all of a sudden the Mac became insanely slow. I opened Activity Manager to see what was happening. For three processes ...
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2answers
5k views

Kernel_task using 300% CPU time, high fan speed and slow computer in MacBook Pro

My MacBook Pro has become slow lately. Activity monitor shows kernel task is using around 300% CPU. The fan is always on at high speed. Below are the details of my computer: Macbook Pro 13-inch, Mid ...
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2answers
678 views

How to monitor CPU core usage?

I have a Macbook Pro 15" with the quad core i7. I am looking to see what if any performance decrease I could expect moving to a 13" Macbook Pro with a dual core i7. To that end I thought Activity ...
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2answers
30 views

Real performance boost with multiple partitions

I have a 1TB Hard drive with multiple partitions where I had previously installed Snow Leopard. Now I'm making a clean install of Mavericks and I have a couple of questions: 1) What are the real ...
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0answers
55 views

Internet Speed Issues on iPad and IOS 8

My iPad4 is running slower on IOS 8.02 than on IOS 7. I noticed this when I updated to IOS 8 several weeks ago. My Optimum service provides 50/25 download/upload megabit service, which I experienced ...
2
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1answer
319 views

How to debug slow terminal prompt?

Ever since I upgraded to Mavericks, the Terminal prompt became a bit slower at coming back. It's not a huge deal, but there's now a slight noticeable delay before the prompt comes back (maybe like a ...
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2answers
103 views

Bootcamp + Windows 8.1 + Apple Macbook 2011

Recently I installed Windows 8.1 64bit on my Macbook Pro (2011). Everything went fine and I am able to duel boot using Bootcamp. Only issue I am facing is poor performance in Windows. Its taking ...
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2answers
552 views

iPhone slows down entire home network

Ever since the automatic upgrade to iOS 7, an iPhone that connects to my Linksys WRT54GL router running DD-WRT, slows down all other connections, from any other device. Download speed is reduced by a ...
3
votes
1answer
2k views

How do I debug Airport Extreme (5th gen) + iPhone 5 wifi performance problems?

Right around when I bought iPhone 5s for my wife and me I also moved in to a new, larger house. I was finding that wifi performance on our fancy new phones was terrible: I have a 35mbps internet ...
2
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2answers
639 views

Why does Reminders seem to be syncing with the network, even though I have reminders turned off in iCloud settings?

I started using Reminders.app as soon as I got iOS 5.0, and for me it mostly works very well. As soon as I got an iCloud account, of course I turned reminder syncing on there as well. However I soon ...
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5answers
2k views

Can spotlight be reset when it misbehaves, is wrong or constantly indexing?

On my 4-month old mid-2012 MacBook Pro I observe that Spotlight seems to want to ALWAYS re-index. I frequently notice that the performance will get unbearably slow and I can hear the hard drive ...
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2answers
569 views

Is there anything like NVELO Dataplex (hybrid SSD/HDD software) for OS X?

I'm interested in upgrading my old MacBook to using an SSD and moving the data drive to where the DVD drive is using an optibay. Often SSDs come with a licence for NVELO Dataplex software (which is ...
3
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3answers
2k views

How much will adding an extra hard drive to my MacBook Pro affect battery performance?

I have a current MacBook Pro 15" i7 2.2Ghz with a 500GB 7200RPM (default) hard drive. I am thinking of replacing both the current hard drive and the superdrive with two Seagate Momentus Hybrid 500 GB ...
8
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6answers
8k 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 ...
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0answers
23 views

Preview scrolling speeds?

When using Preview (on OS X 10.8 & 10.9) I noticed that the scrolling speed is too fast. I often read long documents and want to see in advance what are the chapters coming a few pages later. ...
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2answers
195 views

Why is my late 2013 iMac so slow?

For the last three months I have been more or less enjoying my new late 2013 21" iMac. I already have an early 2011 MBP, which is pretty maxed out with a 512GB SSD and 8 GB of RAM, and still feels ...
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3answers
1k views

Vagrant/VirtualBox extremely slow despite 8GB-RAM/SSD-HD/2.53GHz Core2Duo

My VM (Ubuntu Vagrant VM) is extremely slow. While my Windows co-workers have a maximum of 1 minute page load time, my page load takes up to 8 minutes. I tried putting log files in non shared ...
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0answers
29 views

top / htop for GPU?

I have been having some of the worst performance problems with my Mac Pro that I've ever seen. It seems to start at the darnedest times with no apparent provocation. I've poured through everything ...
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3answers
493 views

Poor battery performance on MacBook Pro [duplicate]

I have recently bought a very expensive new MacBook Pro with 8 GB memory and now I am frustrated by its very fast battery drainage. Often I see only 2 hours left on full battery charge! Right now it ...
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0answers
22 views

Advanced techniques to diagnose performance problems on OS X via DTrace or other means?

I am having some severe performance problem with my OS X workstation at the moment that is proving to be exceptionally elusive. I normally can hunt things down with a handful of tools such as top or ...
2
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3answers
3k views

Can I improve network speed with VirtualBox between host and guest?

I use a VirtualBox machine with Arch Linux as development web server. I want to improve rsync transfer speed via smb://. What kind of configuration is best to improve file transfer/synchronization? ...
0
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1answer
43 views

Why would my Mac be slow after inactivity and then get to full speed after 20-30 minutes of use?

My Macbook appears to get slow after a period of inactivity and then get itself back to full speed after 20-30 minutes. While I have some ideas I'm wondering if anybody else has seen such behaviour ...
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1answer
231 views

Graphics card confusion and pro apps

I'm doing a report and researching various Mac graphics cards and how they would work or not work with pro apps. I'm very confused by all of the terminology and specifications, so I hope I can ...
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1answer
1k views

Can imagent in OS X Mountain Lion be made to consume fewer resources?

imagent is constantly consuming CPU cycles and a couple of GBs of "real memory" on my wife's MacBook Air since upgrading to OS X Mountain Lion. I believe this is part of the Messages app. Is there ...
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2answers
52 views

Will downloading LaTeX slow down my MacBook Air considerably?

I've begun downloading LaTeX and the download is 2GB. My MacBook Air has a 4GB 1600 Mhz DDR3 memory and a 1.3GHz Intel Core i5 processor. Will this large download have any impact of the long-term ...
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1answer
34 views

Where should i look to improve slow I/O performance measured with dd?

I have been measuring my primary disk I/O with the following command : dd if=/dev/zero bs=2048k of=/Volumes/Toshiba/tstfile count=1024 2>&1 | grep > sec | awk '{print $1 / 1024 / 1024 / $5, ...
3
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2answers
270 views

Looking for a manga reader for the original iPad hardware

I'm currently using the app icomic with my 1st generation iPad and have used it for probably 2 years. It's decent, but it struggles to display very large images well. Specifically, the images become ...
2
votes
4answers
966 views

Any better way to purge the inactive memory?

Running purge command in the terminal to free the inactive memory isn't really what I think about Apple. Lion isn't doing a great at all when it comes to free the inactive memory. Free memory is ...
3
votes
4answers
10k views

What can I do to speed up a Mac that is running slow?

My mac seems like it is running slower and slower. While I am thinking abut installing Lion from scratch, I figure there has to be stuff I can do now to help. I have reset PR RAM recently, I have run ...
5
votes
1answer
3k views

Are there performance (slowness) issues with iOS 6 running on iPhone 3GS?

My brother has an iPhone 3GS. The upgrade to iOS 5 has considerably slowed the device. Will the upgrade to iOS 6 slow the device even more? Will iOS 6 work well (not any different from iOS 5) on an ...
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2answers
910 views

Poor Diablo III: Reaper of Souls performance on a rMBP late 2013

I just got a new rMBP (with dedicated video-card) and as a test I decided to run Diablo III: Reaper of Souls on Ultra settings. It looks absolutely gorgeous but its 10-17 fps frame-rate is very ...
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0answers
11 views

How does having a full hard drive affect performance? [duplicate]

My OSX-using friends insist that having a hard drive that is nearly full (e.g. 90% full on a 250GB disk) causes performance problems. It seems to be a pretty common opinion amongst my (mostly ...
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0answers
128 views

MacBook Air CPU Limit Notification

My MacBook air is intermittently slowing down and has very high fan speeds. It went to apple for a replacement logic board and has had these issues since the replacement. Running application monitor ...
4
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2answers
171 views

Samsung SSD 840 speed issue

Can any one explain me this ? I re-install BlackMagic but it ain't change a thing. I'm running 10.9.3 and there is only one partition on the SSD. With the terminal : MBP-Thomas in ~ ○ → dd ...
1
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1answer
271 views

How to limit cpu frequency in OS X?

The OS X kernel does control this directly since below 5% my CPU gets locked to 1.2GHz instead of the normal 3.7GHz so there has to be a way to control the CPU speed. I am aware of this question ...
3
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2answers
168 views

Changing CPU frequency policies in OS X

I have Core i5 processor with nominal 2.3 Ghz speed. But, according to Intel Power Gadget, most of the time the frequency is much lower. Even during intensive usage. It's 0.8-1.6 Ghz. I noticed that ...
5
votes
1answer
1k views

How many CPUs can be assigned to a Parallels Desktop VM?

I have an iMac with the quad core i7 CPU which shows up in Mac OS X as an eight core CPU (thanks to Hyper Threading, I think). Parallels Desktop allows me to assign 1-8 cores to the Windows VM that ...
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1answer
194 views

using external hdd slows down my mac

When I use an external drive via usb, my computer really slows down giving me no choice except reboot. I watched memory usage with activity monitor. Free memory decreases by time and inactive memory ...
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0answers
129 views

How to clean up my iPhone 4S junk files?

I have used my iPhone 4S for about 2 years during which time a lot of junk files left. Does anybody know some clean software that can this for me?
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2answers
186 views

Looking for a free system monitoring tool

I'm looking for a system monitoring tool, preferably a free one. I don't care if it's an actual app or sits in my terminal. Activity Monitor doesn't give me all the information I want at once. ...
0
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0answers
491 views

Performances : Intel HD3000 vs AMD Radeon HD 6490M

I'm working on a MBP 15" 2011 with a new motherboard (Apple changed the previous one in december) and I've now this config : i7 Quad 2.0Ghz; 12 GB DDR3; 250GB SSD samsung 840; Intel HD 3000; AMD ...
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0answers
324 views

Has a Graphics Driver or Something for Intel HD 3000 Been Changed in Mavericks 10.9.3?

So I updated to Mavericks 10.9.3 and didn't really thing anything of it, it just said security updates. After playing a few games and working on my project with OpenGL, I've noticed that performance ...
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0answers
47 views

Terminal speed up doesn't accept command line arguments from outside source?

From a previous suggestion I changed terminals startup command from default to '/usr/bin/bash' which I created as a link to '/bin/bash' which stops terminal from login in every time I open a tab ...
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2answers
113 views

How to keep data from an old Mac to restore later

I have a new Mac, and I want to selectively move files over from an old Mac. I've sold the old Mac and need to ship it today, so what I really want to do is simply take a complete copy of the HD in ...
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1answer
196 views

Do I need to zero out a new disk after formatting it?

Does anyone know if I should 'zero out' the new disk I bought? It was NTFS formatted so, unable to use it like that. I did a repartition to HFS+ in seconds, and then decided it might be better to ...
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1answer
9k views

How to run a performance benchmark on my MacBook Pro?

I need to run some sort of performance benchmark to measure how slow my MacBook Pro is (and why)—a 15" MacBook Pro (late 2008) with a 2.4 GHz Intel Core 2 Duo processor, 4 GB of DDR3 memory, and ...
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0answers
199 views

Macbook Pro (Late 2010) slow after installing Mavericks

I've recently updated my 15-inch, Mid 2010 Macbook Pro to Mavericks. Since then, it's been running incredibly slow and tends to hang while using programs such as FireFox or Excel. If I look at the ...
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1answer
1k views

Mac Mini has slowed to an unbearable crawl!

I've read a lot of other questions about speed, but my question does not seem to be answered anywhere. My Mac Mini is running so slow that I cannot see what I am typing. It takes up to 15 seconds to ...
1
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1answer
311 views

Does RAM Disk Improve OS X Performance?

I stumbled this article explaining how mounting RAM disk can improve OS X performance up to 40× which of course is just a a hyperbole. My question is whether the suggestion made by them valid for ...
31
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12answers
30k views

Why would I disable swap file in Mac OS X?

I came across a thread about installing an SSD drive in MacBook Pro. Someone in the comments also recommended to disable the swap file but didn't say why: sudo launchctl unload -w ...