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Questions tagged [performance]

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

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iMac 21" i3 very slow even on clean install of OS

A friend has a 21" i3 iMac 2019 with 8Gb RAM and it's horrendously slow. He's had Apple Support and Geniuses look at it and they cannot find a problem. The only extra software he has is Photoshop ...
Steve Ives's user avatar
0 votes
0 answers
9 views

Kernel Task + VTDecoderXPCservice consuming inordinate memory when watching a Discord stream

I like to use Discord as a screen-sharing app with my friends, but when I'm watching a Discord stream it brings my Mac to its knees, causing other applications to become very unresponsive. This came ...
turbulencetoo's user avatar
1 vote
0 answers
45 views

Can I fix browser apps that deprioritize code running off screen on inactive space on macOS?

I left Chrome browser working on a task in one space and go to another. When I come back I see that Chrome task that were not visible made less progress than it would done if I stay in that space. ...
Orlagwon's user avatar
1 vote
1 answer
107 views

Is it faster to transfer data if I connect an external SSD to mac thunderbolt USB-C rather than to mac USB-A (if my mac only has 1 USB-A port)?

I have a mac mini, and an external SSD that only has a USB-A port. So, currently, I use a USB-A to USB-A cable to connect the SSD to the mac to transfer data. Now, if I use a USB-A to USB-C cable to ...
Job_September_2020's user avatar
1 vote
0 answers
27 views

iPad Pro Gen 3 (2018) Effective USB Bandwidth

I have a rather unique P2P network configuration between an ASUS GU603HM and an iPad Pro 3rd Gen (2018). I'm using usbmuxd to establish an IP over USB connection between the two. I've also tried the ...
raybb's user avatar
  • 11
2 votes
1 answer
33 views

Slow iMac OS version 13.0.1 - storage discrepency - need advice please

My Mac desktop is running incredibly slow and takes forever to open files and apps. My adult son is very tech savvy, but is not an Apple expert. Any advice based on his input here: Verified total ...
The Vs's user avatar
  • 21
0 votes
0 answers
55 views

My iMac takes more than 30 minutes to start after a restart

I have an iMac, 2019 with 14.3.1 MacOS. I use to keep it on Sleep, but from time to time, I need to either restart or shutdown. Whenever I do this, no matter if I chose to reopen the apps or not, it ...
Tasos's user avatar
  • 123
0 votes
1 answer
48 views

Macbook air 2017 is responding very slowly

I have a Macbook Air 2017 and it became very slow after I installed Monterey in August 2022. I reinstalled macOS twice and also formatted the disk completely. There is no overheating issue at all, but ...
Lovesh's user avatar
  • 1
2 votes
1 answer
61 views

What hardware differences between a Mac Studio and a MacBook Pro might cause differences in performance?

I’m in the enviable position of having a nice wad of cash to spend on a new Mac setup. Since Tensorflow and PyTorch are now both supported by Metal, at least on my 16gb MacBook Air M1 I’m more than ...
Nicholas Walton's user avatar
2 votes
0 answers
78 views

Why is ZFS having such an impact on my iMac?

I installed the OpenZFS on Mac v2.2.2 package for Big Sur 11.7.9, gave it access through the Security Preferences, and rebooted. I used diskutil to erase an external SSD drive I'm testing with. When I ...
Will Hartung's user avatar
0 votes
0 answers
90 views

Ridiculously poor performance of my M1Pro in Geekbench score and heavy tasks

I recently purchased a second-hand M1 Pro MBP 14", and when running heavy tasks its performance is ridiculously poor - several cpu-cores are not engaged, for example. I then ran Geekbench 6, and ...
Chenhao Ying's user avatar
0 votes
0 answers
55 views

2020 M1 Macbook Air having random CPU spikes when using browser

I've noticed that every few minutes my CPU spikes to a 100% (sometimes even higher) whenever I'm using my browser. This happens randomly, but it usually happens when I'm trying to click on something ...
COOL3163's user avatar
2 votes
0 answers
150 views

Why every app that is using iCloud Drive is stuck on iPadOS 17.4.1?

I have been having this kind of issue since Friday evening (2024.04.05). It all started with the Files app not responding (not showing deleted/updated/downloaded... files), then it propagated to other ...
NotationMaster's user avatar
2 votes
1 answer
72 views

Why isn't Mojave using swap despite high memory pressure?

I regularly receive the "your system has run out of application memory" alert, then the dialog box pops up to quickly kill any offending application before the OS crashes. However, unlike ...
P. N.'s user avatar
  • 91
-1 votes
1 answer
61 views

What web site can I visit from Safari on my iPhone that will drain the battery the fastest?

Sometimes I need to drain the battery to zero. I can search for apps that are designed to do this, but I'd like to do it with a web site instead. What sites are designed to do this? Barring that, what ...
All The Rage's user avatar
1 vote
2 answers
49 views

Networked Activity Monitor for CPU monitoring?

I would like to track computer A's CPU (and maybe memory etc) usage on computer B in a GUI similar to that of Activity Monitor. Is that possible? Preferably a free solution. I have looked at SNMP but ...
d-b's user avatar
  • 1
5 votes
2 answers
1k views

After updating to Ventura 13.6.5, the login items are missing and the computer is extremely slow

I use MacBook Air (M1, 16GB, 2020). Today I updated the macbook to macOS Ventura 13.6.5. After the update, The computer boots up and I can login to it. The CPU usage is 1% (i.e. 99% idle) and the ...
ynn's user avatar
  • 201
1 vote
0 answers
97 views

2019 Mac Pro 10GB Ethernet limited to 1.10GBytes Transfer, 944MBits/sec bandwidth

I have a 2019 Mac Pro (Sonoma 14.2.1) that is plugged into a 10GB ethernet switch. The other end is also plugged into a 10GB switch. No matter which direction, iPerf3 is reporting that I'm only ...
stormdrain's user avatar
0 votes
1 answer
178 views

XProtect Consistently Eating Tons Of RAM?

I recently updated my 2017 MBP to Ventura. Ever since, my system has been running very poorly I've noted that 90% of the time, when it is acting up, there is an XProtectRemediatorSnowBeagle process ...
phnord's user avatar
  • 1
2 votes
1 answer
36 views

Can I list/edit/remove the "remembered" display settings for different multi-monitor setups?

I've had various single-external-monitor setups previously, and now I have two external monitors. MacOS seems to remember some previous ones and since one monitor takes slightly longer to wake up, it ...
jhabbott's user avatar
  • 831
1 vote
0 answers
311 views

What is "Open and Save Panel service"?

I put my computer to sleep and everything was normal, but when I woke it up again, the CPU and fans started to run at 100 %. This is what I saw in Activity Monitor: What is this and why does it use ...
d-b's user avatar
  • 1
3 votes
1 answer
298 views

Can MacBook Air 2017 handle 4k video playback

I bought a 4k monitor and now I am connecting the monitor to my MacBook Air 2017 with the mini-DisplayPort to HDMI cable. This cable supports 1440p on 59.98 FPS, or 4K on 30 FPS. When it is on 1440p, ...
SMMousaviSP's user avatar
1 vote
0 answers
47 views

kernel_task slowing down on Intel-based MacBook Pro

I have a 2020 MacBook Pro 16", the last of the Intel based Macs. Just in the last couple of weeks it has been slowing down due the kernel_task process going up to 1000% CPU usage. I have done a ...
Matt's user avatar
  • 111
1 vote
2 answers
189 views

Swap memory usage with 64GB RAM installed

Newbie to macOS and I was wondering if it's normal to have swap usage when the system has more than 6 times of available RAM than being used. I have 64GB of RAM installed and the most memory I've seen ...
NewbieFromNJ's user avatar
1 vote
0 answers
53 views

Mac slowing down / working in burst mode at night (while running Python script)

My setup is differing performance of python code on a MacBook Pro 2021 running macOS 13.6.3. My python script that reads data from a file on the boot volume, makes a 8192*8192 matrix, finds its ...
jms547's user avatar
  • 111
0 votes
1 answer
96 views

How to make MBP bootcamp boot faster

I had a mid 2012 MBP not doing anything and decided to install Win 10 on it. I didn't do a dual boot setup. I replaced the drive which had macOS on it with a spare and installed Windows using the ...
Dude named Ben's user avatar
0 votes
2 answers
87 views

Can folders become too full of items?

I have recently had 2 folders become too full of items. I can save items (bookmarks and backups) to the folder but they do not register and there is no error message saying nothing happened. Result is ...
TBSure's user avatar
  • 1
0 votes
0 answers
182 views

Long delays before executing shell commands

I'm using a MacBook Pro 15-inch (2017), macOS Ventura 13.6.3. When I try to run a command, any command, in a shell, there will often be a delay before the command starts, usually on the order of ...
Chad Groft's user avatar
0 votes
1 answer
52 views

iTerm2 Cannot open more than 6 windows

It seems there is some sort of arbitrary limit in place for the number of iTerm2 windows I can have open on my Mac at one time. I can open up to 6 instances normally, but the 7th instance always ...
ExecutionByFork's user avatar
1 vote
1 answer
101 views

How do diagnose these periodic hangs (M1 2021 MBP)?

For the last several weeks, possibly since I updated to macOS 14 (but I think more recently than that), my MBP has been experiencing these periodic hangs in UI responsiveness. Every once in a while (...
Rick's user avatar
  • 145
0 votes
1 answer
89 views

Carbon Copy Cloner slow backups to Raspberry Pi NAS using SMB

I recently purchased Carbon Copy Cloner, and set it up to backup my Mac to an external SSD (Crucial X6, not especially high-performance). This works wonders, and I can finish an incremental backup in ~...
swineone's user avatar
  • 2,361
2 votes
1 answer
1k views

How to debug slow harddrive read/write speed on Mac?

I have been using multiple units of WD 5TB external hard drive with my macOS 10.13.6 on a 2018 MacBook Pro 15-inch. I realised that it is almost always the case that read/write speeds drop when the ...
forgodsakehold's user avatar
0 votes
1 answer
191 views

How can I speed up Time Machine backups that intermittently taking way too long?

I've long been amazed how fast time machine backups can be these days (well, years); even for really gigs of data. But recently sometimes my backups take forever. It seems to be independent of how ...
Joanna Bryson's user avatar
0 votes
1 answer
410 views

Can the Processor in the Apple Watch Ultra Beat an Old Pentium 4 CPU in Terms of Raw Performance?

I was staring at my watch and remembered an old Pentium 4 PC I had as a kid. This got me thinking, does my watch have more compute power than that PC did? I'm leaning towards a hard yes, but it's ...
akmrv's user avatar
  • 11
2 votes
2 answers
3k views

Finder suddenly very slow

Suddenly all the Finder actions become very slow, while using other apps like Chrome is very fast. When moving files to different folders, I always get a "preparing to move to" pop-up, ...
Pheonix's user avatar
  • 41
0 votes
1 answer
163 views

High opendirectoryd CPU usage caused by Qustodio- Any Fix?

I have an 14" M1 Max that gets very poor battery life, which I suspect is mainly due to the installed internet filter, Qustodio, causing high CPU usage from opendirectoryd. As per activity ...
Rafael's user avatar
  • 121
2 votes
1 answer
970 views

Difference between Apple Pro M2, M2 and M1 using Stable Diffusion

I am benchmarking Stable Diffusion on MacBook Pro M2, MacBook Air M2 and MacBook Air M1. My assumption is the ml-stable-diffusion project may only use CPU cores to convert a Stable Diffusion Model ...
timyau's user avatar
  • 131
2 votes
1 answer
2k views

contactsd using over 50% CPU on my MacBook Air

I wanted to get some information with regards to the contactsd process on my MacBook Air. I often find it using over 50% of my CPU and I would like to know about it and how to disable its excessive ...
aramb-dev's user avatar
  • 126
0 votes
1 answer
213 views

How does Apple's ProMotion display technology affect visual performance?

I switched from a 16 inch M1 MacBook Pro to a 15 inch M2 MacBook Air and realized the Air lacks ProMotion. After comparing tasks like scrolling in (native) apps, or panning and zooming in Figma, I don'...
kettlepot's user avatar
  • 1,829
0 votes
1 answer
396 views

Is there any performance difference between Macbook Air and Mac Mini?

I want an Apple computer but cannot decide between Mac Mini and Macbook Air. I prefer the Mini more, and I own a Logitech Keyboard and mouse and an LG Monitor, so those things are already taken care ...
Asish's user avatar
  • 103
0 votes
0 answers
78 views

I am trying solve "Performance limited due to" issues from powermetrics

My MacBook sometimes crashes. I think this is due to the battery overheating even though I've just changed the battery to a new one and had my Mac cleaned. This is what I get when I type sudo ...
Pavlo Kachmar's user avatar
1 vote
1 answer
83 views

How can I configure my iPhone so that applications in the background aren’t getting network throttled by iOS?

iOS sometimes limits the internet speed of applications in the background. How can I configure my iPhone so that applications in the background aren’t getting network throttled by iOS?
Franck Dernoncourt's user avatar
1 vote
1 answer
274 views

Should I install High Sierra in external SSD in iMac 2017 model for good performance or I can install latest version as well?

I have an iMac 2017 version with HDD and no fusion drive. HDD has slowed down so I am planning to use an external SSD. In my earlier question a generous user told me that in my model of iMac High ...
manish's user avatar
  • 123
0 votes
0 answers
152 views

Bizarre Sudden Slow-Down of Specific MacOS Processes

I purchased a 2020 M1 13" MacBook Pro in March 2021 and it's been like driving a racing car. I use it for everything, and I do a lot as I'm a post-graduate researcher in Electrical Engineering. ...
Sirk's user avatar
  • 1
2 votes
1 answer
173 views

Can an application leave some files behind after it is uninstalled on iOS, and can it slow down or harm the OS in other ways after it is uninstalled?

I wonder the following questions about uninstalling iOS applications: Can an application leave some files behind after it is uninstalled? Can an application slow down or harm the OS in other ways ...
Franck Dernoncourt's user avatar
0 votes
3 answers
186 views

Ethernet USB adapter discard settings

I use Mac Mini Apple M1 2020 with macOS 13.4.1. I have new 1Gbps internet provider and i tried to test speed. My result is only 100Mbps. In my Mikrotik router: name: ether1 ...
Attila Balog's user avatar
1 vote
0 answers
21 views

How to benchmark a performance core on an M1/M2 Pro [duplicate]

I'm running some compiler tests and I noticed that as I ran more iterations per run, the average time increased and the standard deviation increased (which should have decreased as random variations ...
Dave Mason's user avatar
1 vote
2 answers
195 views

kernel_task shutting down network when CPU not overheating

[MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports), 2.3 GHz Quad-Core Intel Core i7, 16 GB RAM, running Monterey 12.6.4] kernel_task consumes inordinate CPU periodically--around 100+% according to ...
Name Withheld's user avatar
1 vote
0 answers
66 views

MacBook Air freezes when disconnected from ASUS monitor

MacBook Air M2, Ventura 13.5. When I disconnect (unplug from) ASUS external monitor, my laptop becomes non-operational; neither keyboard nor trackpad respond. I have to shutdown while connected to ...
WinsomeMac's user avatar
0 votes
3 answers
422 views

Mac Mini 2018 sudden unexplained performance issues

I have a 2018 Mac Mini i7 with 32gb Ram. I have been having strange performance issues lately. I decided to reinstall the OS but it's still happening. I think I noticed the problems initially when I ...
Martin's user avatar
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