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

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5
votes
1answer
570 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 ...
4
votes
1answer
3k 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
189 views

Why don't I see a significant boost in performance moving to SSD on MacBook7,1?

I've got a 2010 MacBook (MacBook7,1) with 8GB RAM running Mavericks 10.9. I recently replaced the stock HDD with a Samsung 850 EVO 250GB SSD and restored from a Time Machine backup. Though Disk Speed ...
2
votes
1answer
111 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 ...
1
vote
1answer
27 views

cpu is 100% used, yet no application shows significant usage

Since a few days my IMac started showing weird behaviour. In Activity Monitor it shows that my CPU is 100% used. Literally 0% idle, but there are no Applications using anywhere near this much ...
1
vote
1answer
86 views

High CPU and energy usage in Safari

Energy impact of Safari is extremely high on my Macbook Air Mid 2013 El Captian 10.11.2. It lead to high usage of CPU (Temperature ~65.0°C) and the CPU fan is running in full speed (6500.0 RPM) ...
1
vote
1answer
35 views

Macbook pro mid 2012 slow down

I'm actually asking about my wife's macbook pro which I don't use very often. It's slowed down quite a bit recently and apparently before the update to El Capitan. Programs have started to take a long ...
1
vote
1answer
176 views

Mac book Pro is very slow on wifi connection

I have three computers in my home. My old computer is a lenovo w530 running windows 10 and my new computers are a 13'' and 15'' inch macbook pro 2015. All computers are connected to the same wifi ...
1
vote
1answer
55 views

How do I investigate my graphics card problem further?

I'm relatively new to OS X and I'm loving it. I've got a MBPr (15″ Late 2013 2.6HGz Core i7 Yosemite 10.10.5 16 GB 1600MHz DDR4 GT 750M, 2GB) that has been serving me brilliantly except for a very odd ...
1
vote
1answer
20k views

What is causing slow Wi-Fi speeds on my Airport Extreme?

I have a recent model (bought 1-2 years ago) Airport Extreme that, until yesterday, has worked flawlessly. Starting yesterday, my wireless speeds have tanked. I first suspected my ISP, but that ...
1
vote
1answer
117 views

How to manually control processes launched on start?

Every time my Mac starts, about ~210 processes are launched, requiring about ~1000 OS Threads. With every Apple update this number increases. My laptop freezes for 1-3 min a couple of times per week ...
1
vote
1answer
199 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
223 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
2k 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
585 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
197 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
0answers
154 views

How do you remedy iMac (2009) slow start-up, and sluggish performance?

here are my system details: OS X El Capitan - gold iMac (21.5-inch, Late 2009) 3.06 GHz Intel Core 2 Duo 12 GB 1067 MHz DDR3 I have reduced startup to 1 or 2 apps, have at least 75GB avail on 500GB ...
0
votes
0answers
25 views

Speed MacBook mid 2010 to run faster?

My MacBook has been slow for several OS updates; I've removed all documents and unused applications. Is there anything I can do to upgrade my mid 2010 MacBook to run faster?
0
votes
0answers
16 views

Why was there such a speed increase on cksfv on El Capitan?

I use cksfv regularly to check large files after I ftp them to my machine. Following an upgrade to OSX El Capitan yesterday I saw a dramatic increase in speed for cksfv. I'd say more than 2x speed ...
0
votes
0answers
90 views

Connect with Windows 10 to Mac Mini with Remote Desktop

I want to connect to my Mac Mini over Remote Desktop. So, I enabled Remote Management in Apple Preferences and connect using VNCViewer on my PC. Unfortunately, quality connection is very poor. For ...
0
votes
0answers
69 views

Why the iBooks lags while scrolling EPUB file?

As it is in the question above. Is there sth wrong with EPUB? Because I just bought a new iPhone 6S and iBooks lags while scrolling EPUB file. What can I do to improve performance while I scroll EPUB? ...
0
votes
0answers
103 views

Office 2016 performance issues

I just upgraded to a Macbook Pro at work with Office 2016 installed and noticed that all of the Office applications (particularly Excel) take nearly 30 seconds to open (compared to roughly 7 seconds ...
0
votes
0answers
41 views

Kill Apps Using Too Much RAM

I have unfortunately been saddled with a developer laptop that isn't fast enough. Is there any app which can flag apps which use up too much RAM and prompt me so I can kill them ? For eg: Xcode , iOS ...
0
votes
0answers
56 views

Degraded wireless performance on MacBook Air

I have a Mid-2013 MacBook Air that has been acting up lately. I initially started seeing issues with ridiculous jitter(100s of ms) half a year ago, but since I do not game a lot, I ignored them. ...
0
votes
0answers
11 views

Cumulative drive access per process over time?

I would like to isolate what processes are accessing drives the most over a given period of time with as much detail as possible as far as even seeing kernel level access. I have thought about ...
0
votes
0answers
80 views

MacBook Pro 13" Retina RAM upgrade Yes / No

Current Situation : I am trying to figure out if in my situation a RAM upgrade from 8 GB to 16 GB is worth the $. Here is my specific situation. I am a simple apple user with a lot of Data. I ...
0
votes
0answers
95 views

Time capsule wired backup transfer slow with fast “bursts”

This has been asked already by someone else here, but there was no answer so I like to ask myself again. I got literally the same behavior, a slow down in read mode from initially like 50MB/s to like ...
0
votes
0answers
40 views

iOS Network Link Conditioner - difference between “in delay” and “dns delay”?

In the Network Link Conditioner profiles, What is the difference between in delay, out delay, and dns delay? I want to test how my app behaves when it makes a request, and the requested server takes ...
0
votes
0answers
39 views

MBP dramatically slowed over the weekend

I have my MBP (13" early-2011 i7) attached to an external screen (not in clamshell mode). I'm not sure what happened over the weekend but the MBP has been possessed somehow; first off it wouldn't wake ...
0
votes
0answers
149 views

Is there a program to monitor GPU processor usage in Yosemite?

iStat only reports memory usage, but I'm looking to see how much of the processor is being used from the AMD M290x graphics card in my iMac. Is this possible?
0
votes
0answers
123 views

High CPU usage during disk operations

Early 2009 17" MacBookPro (MacBookPro5,2) 2.66 GHz Intel Core 2 Duo OS X Yosemite 10.10.3 240 GB OWC Mercury SSD, installed in 2010 I've had issues with high CPU usage for a while now. The original ...
0
votes
0answers
23 views

Low speed rate when transferring data to usb device

When I try to copy data to my USB device I see a very low speed rate. For example, transferring a movie of 750Mb takes 10 minutes. I have tried with some other external USB hard drives but I am also ...
0
votes
0answers
176 views

Skype is using 60% to 80% CPU

I have a Mid-2014 15" MacBook Pro with an Nvidia graphics card. Skype uses around 60% - 80% CPU on my computer when I make a call (doesn't matter if it is video or voice call). I tried doing SMC and ...
0
votes
0answers
38 views

Slowness around Messages in iOS

I have a couple of different symptoms of extreme slowness in Messages which I think are related: Opening the Messages app itself sometimes takes 20+ seconds Opening a conversation within Messages ...
0
votes
0answers
113 views

Pros and cons to JBOD setup on MacBook Pro with two internal SSDs

I've got an original Apple-installed 120GB 3G (3Gb/s) SSD which I'll be moving into the optical bay using an OWC "Data Doubler" and swapping a new 240GB OWC Mercury Electra 6G (6Gb/s) SSD into the ...
0
votes
0answers
100 views

Macbook Pro 17 Early 2008 - Mountain Lion - SSD Slow Performance

I have noticed significant performance degradation on my Samsung EVO running on an Old Macbook Pro, Intel Core 2 duo. Are there any SSD tips that I should apply to this hard drive? Will Trim Enabler ...
0
votes
0answers
89 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 ...
0
votes
0answers
3k 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 ...
0
votes
0answers
428 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 ...
0
votes
0answers
708 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
56 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
205 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
248 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
votes
0answers
282 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
733 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
votes
0answers
189 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
votes
0answers
57 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
votes
0answers
90 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
130 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
205 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 ...