Questions tagged [performance]

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

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1answer
71 views

MBP fan running but no airflow

I have a 2014 MBP, running very well but for one issue: the fan doesn't seem to move any air around, even though I can hear it running. As a result, the laptop gets quite warm, and further, it seems ...
3
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1answer
57 views

Is there a way to “throttle” MacPorts?

I have an unusual request. I'd like to slow down MacPorts. It sometimes uses a ton of CPU resources, and rather than having it run at full speed, I'd like it to run slowly and in the background. ...
1
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1answer
57 views

How large is my 2012 MacBook Air's L1 cache? Are they larger now?

Discussion in comments below this answer to improving speed of this numpy-based diffraction calculator suggest that the reason the script in the answer runs slow for me but fast for others (even on ...
1
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4answers
188 views

Determine which app is opening too many files

Sometimes my Mac starts behaving weirdly, a typical symptom being that I can't open certain apps that were working just fine recently. This just happened and I traced this issue to an excess of open ...
0
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0answers
45 views

28 Core Mac Pro Build times slow

Extremely slow build times on my new Mac Pro 28 core. I notice 2 symptoms. High System CPU usage (80% versus 20% user) and overall the system CPU usage doesn't seem to often get higher them 30%. ...
54
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11answers
42k views

Can I manually limit the %CPU used by a process?

I would like to limit the amount of CPU time dedicated to certain processes (e.g. Firefox, Safari, ...). I can't understand why such programs, even when not used (nothing loading, no animations, ...
1
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0answers
31 views

how to reduce Normal Boot's graphical performance (so that it copies Safe Boot's)?

I am having an issue recently which causes my MacBook Pro 2015, 15", to spontaneously (and randomly?) shut down. These shut downs do not happen in Recovery Mode or Safe Boot. Here is my MacBook ...
0
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1answer
44 views

Catalina Mail super slow when composing new emails?

More people experience slow emails on Catalina? Running a MacPro with 64 Gb RAM and its slow like fek. Especially when typing emails feels very laggy. Running latest version 10.15.2 and I have the ...
2
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1answer
113 views

MacBook Air Running super slow after Catalina update

My MacBook Air(13-inch, Early 2015) 8GB RAM is running macOS Catalina 10.15.2. Now the mac is Super Slow and booting time is consistently 90 seconds +. Every app that I open the rainbow cursor comes ...
5
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0answers
153 views

28-Core Mac Pro build time significantly worse than Macbook Pro [closed]

I'm comparing Xcode build times for my project on two machines: A 2019 Mac Pro with 28 cores and 192 gb of RAM. A 2019 Macbook Pro with 8 cores and 64 gb of RAM. The Macbook Pro can build it in 27.6 ...
6
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2answers
5k views

Poor performance with Virtual Box on MacBook Pro 2017

I am running Ubuntu 16.04 via Virtual Box on my MacBook Pro 2017 w/ TouchBar (3.3Ghz i7, 16 GB 2133 MHZ) and I am getting a very laggy and unpleasant experience on the machine. I have gone through the ...
3
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2answers
170 views

Graphics performance drop after waking from sleep in Catalina (MacBook Pro)

I installed MacOS Catalina last week. I restart my MBP and everything's great, then at some point I either close the lid or just lock the screen for a few hours (sometimes not even a full hour) and ...
3
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2answers
992 views

Game performance halved with screen mirroring on macOS

When I run Portal on my MBP with no external screen connected I get a solid 60 fps. When I connect and mirror another screen (same resolution and game settings) it drops to 30 fps, sometimes 20, and ...
26
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7answers
20k views

Why is kernel_task using so much CPU?

I have a Macbook Pro Retina with the following hardware: Model Name: MacBook Pro Model Identifier: MacBookPro11,1 Processor Name: Intel Core i5 Processor Speed: 2.4 GHz Number of Processors: 1 ...
2
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2answers
212 views

What is the typical CPU utilization of idle iMac?

I am new to macOS. I recently purchased a 2019 iMac (Retina 4K, 21.5 inch). .OMMMMo OS: macOS 10.15.1 19B88 x86_64 OMMM0, Host: iMac19,2 .;...
1
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0answers
37 views

How can I smooth out uneven scroll behavior using a trackpad in Macvim?

I have just installed MacVim on my new Macbook. But I have a problem: on Linux I was able to scroll through my code—vertically moving my cursor—by using my trackpad. But on Macvim this doesn't work ...
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0answers
23 views

Inexplicably High Load

I am finding that even as soon as a boot my MacBook Pro running Catalina up fresh (even after an SMC reset) the load levels can immediately spike to insane levels (like over 100+) and will hover ...
1
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0answers
53 views

Is there a command line program or script to monitor VRAM usage?

I have a mid-2014 MacBook Pro [2.8 Ghz i7 (4980HQ Haswell/Crystalwell), NVIDIA GEForce GT 750M (2040 MB VRAM)], running 10.13.6, connected to a Dell P2715Q 27" 4K external monitor. Since the last ...
-1
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1answer
161 views

How to evaluate different CPUs in 2019 MacBook Pro lineup (2-port vs 4-port)?

If I am looking at the only the 13" MacBook Pros of the 2019 lineup, I see that Apple offers different (non-overlapping) CPU choices depending on whether I start out with the 2-port or 4-port base ...
8
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2answers
5k views

com.apple.hiservices-xpcservice results in frequent hangs and freezes in my mac

Update (2019): The issue still persits even in macOS Mojave, tried everything I could find, nothing seems to solve the issue as of yet! Problem: com.apple.hiservices-xpcservice hangs repeatedly ever ...
21
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3answers
15k views

sharedfilelistd and distnoted hog CPU

I understand from my findings on the topic that sharedfilelistd is an "agent that is used by applications to read/modify recent documents/servers/hosts" and distnoted a "distributed notification ...
1
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1answer
24 views

What are some of the functionalities I can turn off to speed up an old Apple Watch?

As watchOS is being updated, more and more features are added. And for users using previous generations of Apple Watches, the slow down is affecting essential daily tasks more severely. I am not using ...
9
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3answers
358 views

How can I isolate macOS 10.14.6 Mojave freezing 1-2 seconds every few minutes except for sound and the mouse?

Since a week or two I am experiencing a very strange problem on my MacBook Pro running macOS 10.14.6 Mojave. (Build 18G103) No matter what I'm doing, typing something in a browser or text editor or ...
1
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1answer
50 views

Why is Chrome aggressively consuming CPU cycles?

I literally have 0 tabs open, and yet Chrome is consuming a very significant amount of CPU resources, and quickly draining my battery... Why?
2
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1answer
324 views

What should I do about a Mac Mini whose fusion drive is getting steadily slower and slower?

I have a 2012 Mac Mini (running OS/X 10.11.6) with an Apple-provided internal 1TB fusion drive that appears to be suffering from some kind of performance problem -- it seems to be getting slower and ...
2
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2answers
172 views

Serious Performance Problems using Expose in Catalina

Summary I am having a problem where using Expose to drag a window from one Space to another causes an enormous slowdown that looks almost comical - like the machine turns into a ouija board and load ...
2
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1answer
19 views

Activity Monitor data, in recent history?

Lately my MacBook Pro has a lot of moments where it slows down for a few seconds, stops responding to keys and touchpad, displays a rainbow wheel of doom, and then comes back. If I go to the Activity ...
2
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1answer
808 views

Why is my iOS Reminders app slow and unstable when invoked by Siri?

I am a longtime user of the iOs "Reminders" app. And I most commonly create new reminders through Siri, for example by saying "Remind me to pay the rent at 6pm." These Siri requests started taking a ...
1
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0answers
37 views

CPU Not completely Utilized in large workload

I have a Macbook Pro with a i9 Processor and running Macos Catalina. I run CPU extensive tasks daily, but it never utilizes 100% of the CPU. I use Intel Power Gadget to check out my CPU performance. ...
1
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1answer
33 views

Command to release the best amount of Kernel Task and Memory Ram

I have an old MacBook Pro 2012/2013 and it has the El Capitan Through the Utilities -> Activity Monitor tool I can get the following stats according the following behavior: For example if the Mac ...
3
votes
0answers
74 views

softwaredownloadd consuming insane amounts of RAM

When I went into Activity Monitor, I noticed that a process called storedownloadd was consuming 2.7GB of RAM and increasing RAM usage steadily (3.1GB during screenshot). However, it was not consuming ...
1
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1answer
27 views

How to keep 2017 Macbook Pro / Mojave from slowing down when not on A/C power?

All of the guides that I have found are out of date. My model identifier is "MacBookPro14,3". One such example of "slowing down" is that when the MacBook Pro am plugged in, the application iTerm, is ...
1
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0answers
18 views

How to change native Resolution on MBP 2015 running Mojave?

My problem is I would like to change the native resolution of the built-in screen of my MBPR 2015 running Mojave to 1920 * 1080. The thing is I don't want the output to be scaled, I just want this ...
0
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1answer
25 views

Understanding Processor specifications

I'm not sure what a CPU-specification like "3 GHz Intel Core i5" really means. Does it mean that there are five cores with 3 GHz each? Or are there 3 GHz distributed between the five cores? What ...
2
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1answer
50 views

Is my HDD throughput normal?

I am a musician, and was finding my 2011 iMac was getting sluggish with more complex tracks. It was topping out the CPU so I bought a second hand 2015 iMac with a much more powerful CPU. I am finding ...
6
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2answers
171 views

What are the risks with low disk space on a Mac?

I've seen some suggestions about not allowing free disk space to go critically low or ... to have no less than about 15% of your drive's capacity free ... Currently, I've been silencing the "disk ...
3
votes
1answer
89 views

Why does updating Xcode make my computer so slow?

I updated Xcode. Now some things take forever to run. $ time make -n make: Nothing to be done for `update'. real 0m30.069s user 0m0.011s sys 0m0.025s Likewise Python: $ time ./foo.py ...
15
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5answers
3k views

Does battery condition have anything to do with macbook pro performance?

Hello I'm using a mid 2015 MBP. My battery lasts 1-2 hours now, I got this text Condition: Replace Soon on the battery icon. Other stuff are my computer sometimes heats up, gets really slow and ...
1
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4answers
2k views

What are my hardware upgrade options for a late 2009 iMac?

It is now July 2019 and I have this Late-2009 iMac. macOS High Sierra Version 10.13.6 iMac (27-inch, Late 2009) Processor: 3.06 GHz Intel Core 2 Duo Memory: 4 GB 1067 MHz DDR3 Graphics: ATI Radeon HD ...
0
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1answer
209 views

Lag on 4k external monitor and MacBook Pro (early 2016, internal graphics) running in retina mode: can bad cable be a reason or just not enough power?

I just bought new monitor (LG 24UD58-B) because of my MacBook's flexgate issue (when you can't really open lead). I can't bring it to service yet, because where I live it takes up to 5 weeks and it's ...
0
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0answers
38 views

Why does my mac suddenly have long pauses until I restart it?

I will wake my mac up from sleep. I enter the password and push enter; it takes 10 seconds to unlock. All actions are delayed; a chrome tab will show blank before rendering the page. Clicking on the ...
0
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1answer
53 views

How can I fix poor Java performance caused by Mojave update 10.14.6?

I installed the 10.14.6 macOS update yesterday, and now Java is performing very poorly. This is especially noticeable when using Maven to build Java applications. There are projects I build ...
0
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2answers
487 views

Use *Two* Thunderbolt/Firewire adapters on MacBook for 400 and 800 devices?

I'm completing an audio recording setup. Equipment: Macbook 13" Retina late 2012 with Two Thunderbolt ports One Focusrite Saffire audio interface (Firewire 400) One OWC Mercury external SSD drive (...
20
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3answers
25k views

How to monitor and control thermal CPU throttling in OS X?

I recently came across the Intel Extreme Tuning Utility for Windows. I tried it under Bootcamp Windows and it was very interesting to learn in what situations my MacBook Pro's (mid2012) CPU is doing ...
0
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1answer
109 views

How to change MacBook's performance back to normal after it was reduced?

Sometimes my MacBook shows a "Performance is reduced" notification after it gets hot from running intensive apps on a hot summer day. When it's left idle for about 30 minutes and becomes cooler, is ...
9
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2answers
1k views

Do application leftovers have any impact on performance?

Apparently, uninstalling an app by dragging it to the bin may leave application leftovers in some folders (such as Library/Preferences/, Library/Applications Support/, Library/StartupItems/ etc...). ...
5
votes
3answers
2k views

With a data transfer of 50 GB estimated 5 hours, are USB-C claimed speeds inaccurate or to blame?

When I bought an 2017 MBP I was under the impression (from Apple and others) that USB-C was the superfast way to transfer data. It has not worked out that way and I am wondering if I misunderstood ...
2
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3answers
4k views

MacBook Pro with shot battery, possible to prevent CPU throttling?

I have a late-2013 MacBook Pro 15" which still has the original battery. It's at 1,144 charging cycles, and a few days ago the battery health was at about 50%, though since then it plunged to 4%. The ...
1
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1answer
543 views

Can Turbo Booster (3rd Party Application) damage your CPU?

I have turbo booster installed on my old macbook pro which I currently use to handle files between my iMac Pro and the macbook. The macbook has a base clock of 1.4 Ghz turbo boost upto 2.3 Ghz. On ...
3
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2answers
49 views

Could I take a Core i7 form a 2012 MBP and put it into a 2018 MBP?

I know very little about computer hardware so I thought I might as well ask. I have an Intel Core i7 in my MacBook Pro Late 2012. I am considering getting a 2018 MacBook Pro. I was wondering if it is ...