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

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21 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
160 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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0answers
27 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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0answers
18 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 ...
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1answer
38 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
107 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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2answers
50 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
27 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, ...
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2answers
454 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
122 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 ...
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1answer
102 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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2answers
143 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 ...
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0answers
95 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
125 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. ...
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0answers
220 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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1answer
3k 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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0answers
235 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
41 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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1answer
147 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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2answers
105 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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0answers
152 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
177 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 ...
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1answer
178 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 ...
3
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2answers
2k views

Will a 1.8GHz MacBook Air be much faster than a 1.3GHz model?

I am looking to purchase a refurbished Macbook Air from Apple's refurbished store. When comparing the models there are two I am looking at. The difference between the two is slight but one of the ...
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0answers
207 views

How is swap on mid-2013 MacBook Air w/ PCIe SSD?

There appears to be confusing and incomplete information about the PCIe SSDs in mid-2013 MacBook Air 11" and 13" (especially the 128GB models), where a different queue depth may result in different ...
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2answers
2k views

How fast is 256GB to 128GB on mid-2013 MacBook Air?

I've tried finding the comparison reviews of the performance differences between 128GB and 256GB PCIe SSDs of mid-2013 MacBook Air 11" and 13" (which now have been carried over as the ...
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2answers
144 views

RAM Caching - Exploiting RAM to the fullest extent possible

This may seem weird, but I'm actually looking for ways to increase my memory usage. I have a Macbook Pro (8,1) with 4 GB that I updated to 16GB. I really feel like I'm losing a lot for those 10 ...
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1answer
141 views

Upgrading macbook pro to mavericks - performance question

My MacBook Pro: MacBook Pro (15-inch, 2.53 GHz, Mid 2009) Memory: 8 GB Currently run Snow Leopard 10.6.8 and also in a partition I have 10.8.x installed. The most of my work is being done in 10.6.8, ...
3
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1answer
50 views

How can I log OS X Server disk performance?

I know Activity Monitor exists to view disk i/o and other performance metrics. However, does Activity Monitor have the ability to log any of these metrics? If not, how can I log these metrics into a ...
5
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2answers
377 views

Constant SMC resets required

I have a 2009 Macbook Pro, 4GB RAM, 2.26GHz Intel Core 2 Duo. Check battery warning but nothing else overtly wrong. Since I updated to Mavericks (from Snow Leopard), it has been running incredibly ...
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2answers
24 views

What is the read speed of the SSD in the Macbook Air A1466 model?

I'm having trouble finding a figure or proper specs on Google, and I was wondering how fast it is. Anyone know?
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1answer
36 views

TV lagging when watching regular TV channels while Apple TV is on

One of my friends is setting up a TV for another friend, and noticed something very odd. I don't know the specifics of the TV, but we're talking a 2014 Samsung Smart TV that hasn't been cheap at all. ...
2
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2answers
30 views

Measuring page download speed Network Link Conditioner

I'd like to use Network Link Conditioner in conjunction with a local page download speed tool so that I can see how long certain elements take to download when I restrict connection speeds. Can ...
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2answers
399 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 ...
2
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0answers
65 views

What causes playing a video in browser to take up all the RAM?

I've been noticing lately that when I'm playing a video on my Mac from say Hulu, Netflix, Youtube, any video site via a browser, the computer gets extremely laggy for 5 minutes and then acts normal. ...
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1answer
3k views

Monitor GPU performance on OSX

Is there an application or tool that can monitor GPU performance on OS X? Specifically I would like to see the current speed/utilization and temperature of the integrated NVIDIA chip. For Windows, ...
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0answers
66 views

Does free disk space actually help mac performance?

Anyone will tell you that freeing disk space will make your mac faster - specially noticeable if your disk is almost full. I don't know if that's true. Is it? And why, exactly? I just don't see how ...
2
votes
0answers
211 views

OS X 10.9.2 has slowed down MATLAB

I am using 10.9.2 late 2013 computer to analyze my data, specifically with MATLAB, and generally I have many MATLABs open in parallel, doing some analyses for me. MATLAB, X or Y is completely ...
0
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1answer
556 views

How to find out which Safari tab is using massive memory?

As described in my other question, Safari on OS X 10.6. is causing me massive problems (with my way of working like having many tabs in Safari open for a long time). I just realized that after ...
2
votes
1answer
885 views

Safari makes my MacBook incredibly slow - what to do?

System configuration I'm working with a MacBook 2,16 GHz (13" white with the max. 3 GB RAM from about 2007) and "Snowleopard" OS 10.6.8. The problem: performance After a while, the MacBook becomes ...
0
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1answer
566 views

Most stable/fastest OS X version for an old MacBook Pro

I have a MacBook Pro (15-inch, 2.4/2.2 GHz, mid/late 2007) that has had a few graphics card problems. The logic board has needed replacement a couple times, meaning we stopped using graphics-intensive ...
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2answers
59 views

Mac is really slow and I can't get Apps to open

When I try to open an App it does nothing. I go online and it is extremely slow. I have tried some of the idea's on here but, nothing has helped. I also tried to download a Clean up program. It isn't ...
0
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1answer
39 views

Is multi desktop more resource expensive?

I want to understand if connecting a second or third monitor to my MBP means exactly the OS to draw 3x output and stuff, so it is at least 30% more under stress.
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0answers
50 views

What should my performance expectations be for development from a mid 2009 MacBook Pro?

I am going to be writing some iOS applications. To do so I am borrowing a 2.26 GHz Intel Core 2 Duo Mid 2009 MacBook Pro (MacBook Pro5,5). Currently the machine has only 1 GB of memory, but I intend ...
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1answer
57 views

Best version of OSX for 2008 iMac?

(This is a follow-up to How to improve old, slow iMac -- new SSD? Or more RAM?) I replace the HD on our old 2008 iMac 8,1 with an SSD, and it seems much faster. However, it WAS running 10.9; now it's ...
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1answer
76 views

Am I likely to get a performance improvement upgrading iphone 4 from ios6 to 7.1?

I have an iPhone 4 that I didn't upgrade to iO7 because I'd heard a lot of people saying it hurt the phone's performance, and my phone's performance was already pretty terrible. I've seen people ...
2
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3answers
220 views

Reviving white macbook (Early 2009)

I'm trying to revive my old college laptop which is a white macbook from early 2009. I pasted the hardware a software specs below. The last thing that I did with it was update it to Mountain Lion, ...
0
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1answer
58 views

Does clearing Safari's cookies actually help the iPhone's overall performance?

There's an iPhone 4 that has been getting pretty slow lately, so I figured I'd browse a bit about how to fix it. One particular tip several sites seem to suggest is clearing Safari's cookies. I am ...
2
votes
2answers
133 views

Restore from backup or start anew?

I have a new iPad air to replace my old iPad 2. I'm from a PC background but love Apple phones and tablets and have always wondered, from a performance point of view, would it be better to restore ...