All Questions
Tagged with hang or performance
1,583 questions
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How can I improve my MacBook Pro M4 Max video playback experience in Final Cut Pro?
I am migrating from a 16" MacBook Pro (last Intel version) to the new M4 Max MacBook Pro with the upgraded (non-binned) M4 chip. It was custom ordered with 64GB of RAM and a 2TB SSD.
I have a ...
- 5,570
1
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23
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How to throttle MacBook M3 so a browser-based game runs at normal speed?
Now and then I love to play a game on the internet archive, specially for the Mac. It's a 1986 game (Dark Castle) and runs beautiful in my browser. With my previous 2014 Intel MacBook it ran on a ...
- 601
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26
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New M4 Max - watching videos on an external disk has occasional video and sound freezes (old Intel i9 didn't have the same issue with the same setup)
I am surprised this is happening on my new M4 Max, especially when it didn't happen on my old 2019 Intel i9! I literally switched the old out for the new, so it's the exact same disk and setup (aside ...
- 209
2
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2
answers
52
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Sticky mouse pointer when using VMware Horizon Client
I'm using VMware Horizon Client Version 2406.1, Build 8.13.1 (11490701655) on a M2 Mac Studio connecting to a Windows 10 workstation. In single monitor mode it works fine, but when using two or all ...
- 205
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1
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36
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Getting number of performance cores and efficiency cores of MacBook Pro in Terminal
The number of performance and efficiency cores differs wildly between all the variants of the Apple silicon M cpus and Apple usually does not list these even in the technical specs.
Is there a way to ...
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2k
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Does the new M4 Pro chip support USB 3.2 Gen 2x2 standard?
Do the new M4 Pro Mac Mini and M4 Pro Macbook Pro, which now have Thunderbolt 5 ports, support the USB 3.2 Gen 2x2 standard?
USB 3.2 Gen 2x2 supports transfer speeds up to ~2,000 MB/s for SSDs, but ...
- 409
1
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1
answer
84
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How to monitor the process of exporting a mailbox from Apple Mail?
To free some space from iCloud Drive, I yearly move my Sent mail from the previous year to a dedicated mailbox, export it to a non-cloud location, and then delete it from Mail.
Since this is the first ...
- 1,674
1
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1
answer
295
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Disable memory swap / compression on a single process
When swiping to change spaces (after a few minutes of idle), there is 1-2 second of delay before the animation starts to play (and plays with a lot of stutter). It seems like this is related to swap ...
- 2,953
8
votes
1
answer
719
views
Safari causes high CPU load for no reason, launchservicesd active
After a couple of days, when I have Safari open, I have an unexplainable high CPU load, apparently system time. launchservicesd is active with 50%-110% CPU load.
The load disappears immediately when I ...
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124
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Why is the "Move left/right a space" shortcut slow, when "Switch to Desktop X" is fast?
This drives me crazy.
I am using MacOS Sonoma 14.4 on M1 Max macbook.
When using shortcuts to move left/right a space, not only the animation is slow, but then the time to interactivity is also slow. ...
- 99
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15
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iPhone Podcasts app crashes when Low Power Mode deactivates
The Apple Podcasts app for iPhone is one of the buggiest pieces of software I've ever used. It crashes frequently, often failing to remember the last played content (instead it brings up something ...
- 1,194
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64
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APFS filesystem performance is very poor
I am curious why the performance of my logging routines (using O_APPEND) are so poor on MacOS, and did some testing. The performance is quite bad. Is this a known problem with APFS?
These tests are ...
- 111
2
votes
1
answer
47
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Screen sharing high CPU usage when using mouse / keyboard
I'm connecting into an M1 macbook (Sonoma) from a 2019 iMac (Sonoma, 64GB, i9, Radeon 570x 4GB) using Apple Screen Sharing.
Especially when viewing Chrome / Electron based applications, the iMac's ...
- 121
3
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1
answer
931
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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 ...
- 201
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87
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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 ...
- 121
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49
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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.
...
- 11
1
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1
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138
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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 ...
1
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0
answers
61
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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 ...
- 11
2
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1
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37
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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 ...
- 21
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155
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 ...
- 83
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1
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248
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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 ...
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2
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291
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Connecting iPhone to both WiFi network and 4G/5G simultaneously?
Someone asked some time ago and I cannot believe it is not sorted: https://discussions.apple.com/thread/254808545?sortBy=best
My use case:
WiFi at home
5G in the garden
But as I walk around the ...
- 794
2
votes
1
answer
189
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 ...
2
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0
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269
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 ...
- 251
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182
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 ...
0
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0
answers
185
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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 ...
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231
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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 ...
- 1,674
2
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1
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91
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 ...
- 91
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1
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397
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 ...
- 129
1
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2
answers
52
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 ...
- 3,484
5
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2
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1k
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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 ...
- 201
1
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171
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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 ...
- 88
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1
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354
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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 ...
- 1
2
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1
answer
75
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 ...
- 841
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750
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 ...
- 3,484
3
votes
1
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551
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, ...
- 133
1
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0
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84
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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 ...
- 111
1
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2
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471
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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 ...
- 13
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98
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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 ...
- 111
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1
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174
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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 ...
- 1,870
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2
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133
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 ...
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335
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 ...
- 101
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2
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92
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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 ...
- 163
1
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1
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173
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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 (...
- 145
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1
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137
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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 ~...
- 2,371
2
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1
answer
2k
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 ...
- 393
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1
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328
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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 ...
- 137
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1
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927
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 ...
- 11
2
votes
2
answers
4k
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, ...
- 41
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1
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267
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 ...
- 131