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

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3
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1answer
298 views

How To Record CPU and Memory Usage Data

I want to profile the execution of a program to see what in particular is slowing it down - whether it hits a memory cap or if my CPU is not powerful enough. Activity Monitor (the one that comes with ...
2
votes
1answer
62 views

Does OpenCL automatically use all GPUs in my system?

Through dumb luck, I've ended up with 3 OpenCL-capable graphics card in my Mac. I even ran the little "list all your OpenCL devices" sample program from Apple, and it lists all of them. Do programs ...
2
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
votes
1answer
550 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 ...
1
vote
1answer
9 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. ...
1
vote
1answer
145 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 ...
1
vote
1answer
125 views

For the Apple SSD drives, will they run slower with less free space available?

From what I understand, most SSDs will run slower once there is 20% or less free space available, due to TRIM/garbage collection. However, are Apple SSDs the same way? The reason I ask is because ...
1
vote
1answer
83 views

Hot File Clustering with multiple partitions

I'm planning a performance-oriented clean install of OS X 10.6 and I was wondering if the hot file clustering feature will exists only on the boot partition or if there will be one for each partition ...
1
vote
1answer
714 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
vote
1answer
143 views

Want to increase spead and reponsiveness in older Mac

Current Information: Software: Mac OSX (10.5.8) Processor: 2.4GHz Intel Core 2 Duo Memory: 1 GB 800 MHz DDR2 SDRAM I want to get my computer moving faster, specifically around safari, itunes, ...
1
vote
1answer
161 views

Move Large, Frequent files closer to center of HDD

Is there a native/third-party utility (or native trick) to move large, frequently-used files closer to the center of the disk? I was under the impression that the OS tried to automatically optimize ...
0
votes
1answer
63 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 ...
3
votes
0answers
784 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 ...
2
votes
0answers
43 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. ...
2
votes
0answers
27 views

Chrome loads very slowly while Safari very fast

Chrome loads any web page very slowly. Even making a google search takes more than 15 seconds while the same occurs in Safari instantaneously. I cleared the cache and disabled NPAPI plugins as ...
2
votes
0answers
189 views

AppleScript to find old mail messages is slow in ScriptEditor

So I have an AppleScript that iterates over all the messages in various mailboxes and finds messages which meet various criteria and moves them to Deleted Items. The mailboxes in question are ...
2
votes
0answers
466 views

How to fix 10.8 internet sharing resulting in poor file sharing performance and no Time Machine server?

TL;DR - File sharing performance is extremely poor on a Mac Pro running 10.8.2 with file sharing enabled. Using it as a Time Machine server also no longer works in this setup. I have been ...
1
vote
0answers
90 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 ...
1
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0answers
23 views

Show iPhone connection speed

I'd like to know if there is a way to show the current mobile link speed on my iPhone 5s. I mean the "physical" max. of the currently negotiated connection to the cell tower, not the actual ...
1
vote
0answers
62 views

How do I remove akamai and speed up my iMac?

I have an iMac (running Leopard) going deadly slow, I discarded any hardware problems (Hardware tests, disk utility, etc..) and the only strange thing I've found is a folder called 'akamai' After ...
1
vote
0answers
31 views

Acceptable and unacceptable speed for an external USB disk

I think my external HDD is running way too slow but I am not sure. Using XBench I get the following results: Seq: Uncached Write 0.79 0.49 MB/sec [4K blocks] Uncached Write 0.21 0.12 MB/sec ...
1
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0answers
30 views

MacBook Air is slow after inserted and removed USB audio player

I have a first generation MacBook Air. I plugged in a USB memory stick, which is actually a 2 GB MP3 player but serves as a memory stick as well. Finder never shows the content of the memory stick. ...
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0answers
31 views

TimeMachine performance issues on OSX Server 10.7.4

we are running OSX Server 10.7.4 on a MAC Pro (Mid 2010). Enabled services are Mail, Calendarserver, Contacts and Websharing. The Server has a Xeon Quad CPU and 32GB of RAM. A timecapsule is ...
1
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0answers
79 views

Macbook Pro Late 2011 stuck at 0.8 GHz

I have been experiencing a lot of problems with my Macbook Pro slowing down and crawling through small tasks like getting mail and opening Launchpad. I have 8 GB of 1333 MHz DDR3 memory and a 2.2 GHz ...
1
vote
0answers
86 views

System very slow while and after login

I'm using OS X 10.8.4 on a Mac Mini with 2.3 GHz Core i5 and 8 GB RAM. For security reason I have to lock my computer to screensaver while I leave my seat for a while. I set it up so that password ...
1
vote
0answers
207 views

Why are disk images on AFP shares being disconnected?

I have a FreeNAS File Server which provides AFP shares to my Mac OS X clients. I'm seeing some strange performance issues between OS X 10.7.5 clients and the FreeNAS server. My goal is to use the ...
1
vote
0answers
167 views

Is 3G-less iPad considerably faster on wifi than iPad 3G?

I've just experimented with three 3G-less iPads and they all were much faster than this one iPad 3G that just never goes through my 128mb download, all over the same wifi. They're also all 16gb, if ...
1
vote
0answers
74 views

Emulating lower speed CPUs on Mac mini

I would like to ask whether it is possible to develop OS X application (especially for Lion) on a Mac mini, being able to test how the performance would be on a lower speed CPU. For example: ...
1
vote
0answers
176 views

Guide on removing unused Agents and Daemons to speed up MacOS

Can you point me to a good guide on spotting and getting rid of running Agents, Daemons and Processes that aren't useful to me anyway and are taking up memory and CPU cycles?
1
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0answers
685 views

helpd uses 100% CPU after installing any application with documentation

I see that after installing a software that ships with documentation in OS X’s help document format, the helpd process uses 100% CPU for up to 5 minutes or so. I also see this when you first install ...
1
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0answers
144 views

How about Parallels 7's Lion support especially in graphics performance?

I heard that Parallels 6 lack of GPU acceleration with Lion guest. So it's very slow. How about this on Parallels 7?
0
votes
0answers
24 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 ...
0
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0answers
21 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 ...
0
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0answers
16 views

Spring 2010 MBP discrete GPU performace vs current MacBook Air?

I have been using a mid-2010 MacBook Pro with 2.66GHz Intel Core i7 processor, 8 GB RAM, 7200 RPM 512 MB hard drive, and a NVIDIA GeForce GT 330M 512 MB discrete graphics card. After almost four ...
0
votes
0answers
87 views

What are the consequences of running the 13" retina MPB in higher native resolutions

This question is basically about how do different resolution settings affect the performance of your macbook. By default retinas are set at the "retina" display mode. You can also set them to the ...
0
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0answers
23 views

What could explain less than 1Mb pre second speed on a WD Elements external drive?

I have a multi year old WD Elements external drive, attached to my 5 year old Mac Pro. Everything runs fine except it seems that the drive is transferring data very very slowly. I don't know how long ...
0
votes
0answers
406 views

Sometimes I can run Civilization V on my 2013 MacBook Air, sometimes not, why?

I realise the 2013 MacBook Air doesn't quite meet the game's minimum requirements, but I can sometimes run Civilisation V. Sometimes it loads, fires up the fan, but sits there with a blank screen ...
0
votes
0answers
30 views

How can I prevent “Open With…” from accessing external drives?

Frequently, when I try to open the (10.9) Finder's "Open With..." menu, I experience a delay that appears to be due to connected FireWire drives. This delay is very long when the drives need to spin ...
0
votes
0answers
98 views

Reduce impact of Disk IO on performance

I've never found that OS X has been exemplary at handling responsiveness under Disk IO, but Mavericks has made it so bad that I've been barely able to use my machine whenever a backup kicks in. ...
0
votes
0answers
137 views

Fastest encryption configuration for Parallels Desktop 9 running a software development environment

I have a 2.8ghz quad-core 2013 MacBook Pro with 16gb RAM and a 768gb SSD running OSX Mavericks. I run Windows 7 under Parallels Desktop 9 to do Windows development. I would like to encrypt this data ...
0
votes
0answers
93 views

Is there anything other than ZDnet Clock that I can use to overclock Macbook Pro (Zdnet version incompatible)

It's a mid-2011 Macbook pro model. I tried with Zednet but it said my model is not supported. I've added more ram to my Mac but am still looking for a way to make it faster.
0
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0answers
523 views

Macbook Retina 2013 CPU difference

According to Wikipedia, these are the CPU alternatives for the new MBPr 13". 2.4 GHz (i5-4258U) dual-core Intel Core i5 Crystalwell processor with 3 MB shared L3 cache (13") 2.6 GHz (i5-4288U) ...
0
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0answers
591 views

Are there specific performance issues with iOS 7?

This article alleges performance issues with iOS 7, specifically for iPad 2 and 3, and iPhone 4. Are these performance issues reproducible? Are there compelling reasons to avoid upgrading due to ...
0
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0answers
223 views

Are there serious problems using a 2012 MacBook Air (13 inch) for web development?

Hello I am totally new to the Mac world and I am interested can I use the MBA for web dev. My needs are modest: Adobe Photoshop CS6 Sublime Text 3 MAMP/XAMPP I do not need to optimize for 3D ...
0
votes
0answers
679 views

How to troubleshoot slow-as-molasses Safari 6?

When I upgraded to Lion, Safari 6 came along, and I find it so slow that it's almost unusable. The problem is most pronounced when first fetching pages, especially in the first few minutes after it ...
0
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0answers
157 views

Apple TV required switching hardware / mobile WiFi router

I am considering Apple TV for a trips, but usually the hotels' wifis' connections are separated. I came up with using my Vodafone branded Huawei R201 mobile wifi router for that purpose, but I am not ...
0
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0answers
55 views

Is there a way to monitor the stack of execution in order to find the longest hangs?

Related to this unsolved mystery: apple.stackexchange.com/questions/62416/why-do-i-get-serious-execution-lag-on-clicks-application-switching-and-general I'm wondering if there's a way to see which ...
0
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0answers
70 views

Apple iPad - intermittently crashing

I've inherited a 1st generation iPad. It seems to work fine, except for the reason I inherited it, which is that every so often, whichever app is running will simply close for no discernible reason. ...
0
votes
0answers
97 views

Measure Application Load Times?

Anyone know a way to measure application load times? I've looked at instruments but having a hard time pinning down the statistic/event I should be looking for. I want to measure how long it takes ...
0
votes
0answers
191 views

iPad/iPad2 - PDF page rendering speed

I would like to know how long (in milliseconds) does it take for the iPad/iPad2 to render a PDF page. Every page and every PDF are different, of course. I am interested in average figures if you have ...