Questions tagged [performance]

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

89 questions with no upvoted or accepted answers
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Very slow SMB on MacOS with 10G network

We have a 10 Gigabit network with a mix of Windows 10, Linux and MacOS (Sierra 10.12.6) machines. The transfer speeds between the Windows or Linux machines are OK: between 500 and 800 MB/s for big ...
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268 views

Messages is unusable due to unresponsiveness!

Messages on High Sierra has become increasingly unusable for me. I get frequent (every dozen words or so, at least once per message) long (5-20s) lags when typing — which seem to occur most often when ...
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2k views

recentsd process has very high memory usage (almost 2GB) - how to fix?

Right now, activity monitor shows that a process called "recentsd" is using 1.82GB of memory (1.08GB compressed, 752MB private) on my MacBook Pro running macOS 10.13.1. Some googling has lead to the ...
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595 views

AppleSpell error: Contacts change history truncated, resetting!

My macOS High Sierra system is increasingly slowing to a crawl and having huge spikes in CPU usage, notably in Messages, but even when it not running. The logs that seem to be most closely associated ...
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772 views

after High Sierra upgrade: very slow opening big files > 1 GB and message “Verifying”

When opening a big file (for example with VLC or QuickTime) this message pops up for lots of seconds (different durations for each file): I use encryption on iMac 5K. > diskutil list /dev/...
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307 views

Higher kernel_task CPU usage when playing audio through Thunderbolt Display

I noticed today a higher kernel_task CPU usage when playing audio through Thunderbolt Display from my Macbook Pro (early 2011) on OS X Yosemite. Although the CPU usage is not very high (15 - 20%), it ...
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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 ...
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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 ...
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3k views

Macbook performance issues with browsers

I have a MacBook Pro from 2013, and I'm having issues in both Chrome and Firefox - both are slowing down to a crawl, and when I check Activity Monitor I have multiple processes (in all the 'tabs' at ...
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330 views

Parallels 13 internet speed is slower than the MacBook pro speed

How do I get the internet speed on the virtual machine the same as the Mac book internet speed? The Mac speed is 300-400 and the virtual machine is 70-120.
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865 views

MacBook Pro 15" 2015 CPU throttles down to 0.8 GHz

My MPB has had this problem for years every time the ambient temperature gets a bit warmer. It starts in the spring and gets ridiculous during the summer. The MBP clocks down its processor to 0.8 GHz,...
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1k views

Choppy/Jerky Video Performance on MacBook Pro 13" 2016

I upgraded from a Late 2013 MacBook Pro 15" to the 2016 13" MacBook Pro. On my old laptop, watching YouTube videos, and PlayStation Vue was smooth. However, on this new laptop, the video is jerky/...
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350 views

Is there a way to throttle nsurlsessiond/cloudd?

I have been looking for a way to permanently throttle these two processes. By default, they are all or nothing processes killing my network connection unless I manually "pause uploads" for iPhotos (...
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911 views

High windowServer CPU usage on Yosemite

Since upgrading from Mountain-Lion to Yosemite, my MacBookPro5,5 (13", 2.26GHz C2D, GeForce 9400m) is (almost always) showing bad performance while working with native windows like Finder, System ...
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128 views

Prevent Open/Save dialog from solliciting external hard drives

I have several external drives, which I don't use constantly, and so they spin down, and rest. Unfortunately for me, every time I have the "Open..." or "Save..." dialogs, Mac OS X spins these hard ...
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719 views

Is there source code or an update for the Mac Pro 3,1 overclock utility that ZDNet produced several years ago?

The Mac Pro from 2008 (MacPro3,1) is still a fairly relevant machine in the modern OS X as not only does it run the latest releases of OSX, but also the 8 CPU cores that it came with provide enough ...
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1answer
107 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 ...
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592 views

Speed up FileVault decryption process

There is a reason for me (testing) to turn off FileVault encryption on the boot drive on my Mac running macOS High Sierra (long story, off topic). So, I turned it off in System Preferences. I also ...
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0answers
1k views

Mid 2015 retina MacBook Pro: Startup slow after SSD Upgrade

I've recently upgraded my Mid 2015 retina MacBook Pro's original 500 GB SSD to a 2 TB Samsung EVO 970 NVMe M.2 coupled with a recent model Sintech SSD adaptor. I am running macOS High Sierra 10.13.6. ...
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261 views

Slow animations/graphics after waking from sleep or sometimes at random

Product: Model Name: MacBook Pro Model Identifier: MacBookPro11,4 Processor Name: Intel Core i7 Processor Speed: 2,2 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB ...
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0answers
457 views

loginwindow high CPU usage

I have simple zsh script which executes the following code at a regular interval. spotify_track=`osascript -e 'tell application "Spotify" to name of current track as string'`; This is causes ...
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0answers
638 views

Disable Intel SpeedStep on a mid-2015 MBP w/ High Sierra w/ kernel_task issue

Please note I've read every other thread about this issue, and none of the suggested solutions work, primarily because they either refer to older OS versions or to removing machine profiles in ...
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0answers
197 views

Ffmpeg: Arguments for optimizing video stream?

I'm using FFmpeg from a Debian machine on my local network. This machine is listening from incoming streams: $ ffmpeg -i udp://192.168.1.3:8080 /path/to/out.avi And from my MacBook, sending the ...
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0answers
93 views

That Kernel Process Bloat

This is probably a question best suited for Apple Support Forums, but after asking variants of this question there to no avail, I will try here instead. I have a 2012/2013 2.3 GHz i7 Mac Mini w/ 16 ...
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0answers
8k views

Mac performance issues and dyld cache

I have MacbookPro mid 2012, Sierra 10.12.4, 512 GB HDD (the initial factory disk), and 16GB RAM (2x8GB, memory was upgraded from the initial 4GB). Periodically I get the spinning pinwheel of death (...
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0answers
125 views

Late MBP 2015 vs MBP 2016 gaming experience (WoW, HotS)

I fully understand these machines are not designed for gaming at all, but I was wondering if you guys can tell me approximate FPS for these games: World of Warcraft Heroes of the Storm with let's ...
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118 views

iOS frame rate drop without maximum device utilization

I am making an iOS game using Unity. I am testing some shaders that I have made for the game, and in some cases the device will run at under 30 FPS but not have 100% device utilization. Sometimes a ...
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0answers
281 views

iBooks on El Capitan

I have a large number of items in iBooks. Some are ePub, and there are lots of work related PDFs. In total, I have around 20k documents that I want to sync to my iPad to carry around as a convenient ...
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0answers
79 views

What is Yosemite doing when it has a seizure?

Ever since I installed Yosemite on my iMac, it's become unresponsive for about 5–10 seconds when I do any of a variety of common actions. The following usually trigger a delay: a few seconds of no ...
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0answers
2k views

Airport Extreme (5th gen) throttling ethernet internet speeds

I purchased the router in 2012, and am experiencing slower speeds than expected from my Airport Extreme. Brand new 16x4 channel DOCsis3 modem on Time Warner's approved list. 200 Mbps plan, and ...
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0answers
676 views

FreeNAS, OS X Yosemite and automount

I've got FreeNAS 9.3 server (HP Microserver N54L) and connecting to it via NFS from my multiple OS X systems (running OS X Yosemite 10.10.1). I've always had low performance over the network (1Gig ...
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0answers
112 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. I'...
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0answers
371 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 ...
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0answers
65 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 ...
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0answers
688 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 ...
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0answers
627 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 ...
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0answers
565 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?
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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 ...
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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
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 ...
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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. ...
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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 ...
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0answers
32 views

How to optimize Mojave for inside a VM?

This may sound like possible duplicate, however it's not. The focus of the question is very specific to OS version macOS Mojave 10.14, with a very specific goal in mind explained below. The host OS ...
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0answers
34 views

macOS Server VPN (L2TP) speeds choking on Mac Pro, but not Macbook Pro

I have a MacOS Server (10.12.6) set up running a VPN server at one location (site A). I have a Mac Pro (10.12.6) and Macbook Pro (10.14.5 beta 3) running at a second location (site B). Both sites have ...
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0answers
114 views

General computer slow-down while transfering files

I frequently need to transfer files between 10 GB and 1 TB as part of my work, typically between external drives and network servers. Whenever I transfer files, the computer slows down to being ...
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0answers
287 views

GUI unresponsive or slow, but CPU and RAM healthy

I've go two MacBooks: MacBook Air, 11-inch, 2013, running 10.11.6, 8GB RAM, 1.7 GHz Intel Core i7, integrated graphics MacBook Pro, 15-inch, 2018, running 10.13.6, 32GB RAM, 2.9 GHz Intel Core i9, ...
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124 views

How can I troubleshoot my slow 2015 Early MacBook Air 13" laptop?

I have a 2015 Early MacBook Air 13", 1.6 Ghz, 4GB RAM, 128GB SSD (with 90GB free space) running macOS High Sierra 10.13.6. When I'm using Safari with only 4-5 windows open, it slows down. I have to ...
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0answers
123 views

number of pg_ctl processes keep increasing on macos High Sierra

After approximately one day of system uptime, my MacBook Pro runs extremely slow. I am running macOS 10.13.5 and Activity Monitor shows ~70% idle cpu usage and the memory pressure is on green but ...
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0answers
63 views

How can I optimize for file sharing on my Mac Mini 2014 (High Sierra 10.13.4)?

I'm running a Mac Mini 2014 with High Sierra (10.13.4) and am experiencing some lag, since adding a pair of Thunderbolt RAID drives. I've also added 25 or so SMB sharing users. Only a few users are ...
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604 views

My Mac Pro fans completely refuse to speed up

I recently purchased this 4,1 Mac Pro in pristine condition. Only issue is, none of the fans will speed up under heavy load. The temps can go up to 90°C and none of them speed up. I can manually speed ...