225
votes
A tech from MacKeeper wishes access to my computer for licensing and activation. Is this a scam?
Do not do this.
There are exactly zero reasons a tech, or anyone else for that matter, would need remote access to your computer to "fully license and engage a program."
That phrasing alone ...
- 93.1k
204
votes
Accepted
How to investigate high kernel task memory usage?
There are many things that go wrong with high kernel task usage. Usually this is related to faulty or heavy process which overusing system resources (such as indexing storage, running VMs, too many ...
- 12.4k
98
votes
A tech from MacKeeper wishes access to my computer for licensing and activation. Is this a scam?
MacKeeper IS Malware. Run MalwareBytes on your Mac and it will remove MacKeeper. Here's what you need to do:
Uninstall MacKeeper as best you can
Run MalwareBytes to get any pieces of it you missed
...
- 1,668
93
votes
Accepted
How to monitor and control thermal CPU throttling in OS X?
To monitor throttling, you may run:
pmset -g thermlog
in terminal and watch output:
If CPU_Speed_Limit is less than 100 at some moments, then it means CPU is throttled.
- 1,046
84
votes
Time Machine ridiculously slow after El Capitan upgrade
Part of the issue is that low priority input/output-operations (I/O) now seems to get throttled heavily. You can check it via Terminal (can be found via Spotlight (usually bound to ⌘Space) and ...
- 941
80
votes
Cursor freezes for a split second around every 10 seconds
I've had something like this issue (with the mouse freezing momentarily every few seconds), and it was related to my second screen. If I left this second screen turned off after waking the Mac from ...
- 908
58
votes
A tech from MacKeeper wishes access to my computer for licensing and activation. Is this a scam?
Scam. Scam. Scam. Scam....
There is never - as in absolutely never ever until the sun boils and the earth burns - why an unsolicited request to access your computer from someone you don't know and ...
- 669
47
votes
Screen Saver Stuck On, How To Escape?
I encountered this problem for the last two days on Catalina on my iMac. I tried some suggested methods, but lacked an Apple keyboard, and didn't restart or use SSH.
What eventually worked for me, I ...
- 581
39
votes
A tech from MacKeeper wishes access to my computer for licensing and activation. Is this a scam?
It may not even be MacKeeper. It could be scammers pretending to be MacKeeper, with the same end-goal as the Microsoft tech support scam: to gain control of your computer.
Why on earth would ...
37
votes
Accepted
How to determine if my 2015 MacBook Pro can still handle current workloads?
I would look at three things
Time is money
List specific measurable benchmarks ( e.g. launch 4 specific apps each day and time them till usable, script a clean build of a representative app )
List ...
- 229k
35
votes
Accepted
Why is kernel_task using so much CPU?
You have classic symptoms that thermal issues are causing kernel task to preemptively use up CPU to prevent overheating. If you haven't reset the SMC, try that one time. If the System Management ...
- 229k
30
votes
Accepted
ZSH paste from the clipboard a command takes a few second to be write in the terminal
The final problem is related to zsh.
oh-my-zsh is executing bracketed-paste-magic, so I ended up removing it.
Because oh-my-szh doesn't have a plugin manager for this. You have to override the file: ...
- 679
27
votes
How to monitor and control thermal CPU throttling in OS X?
The official Intel Power Gadget has a Mac version.
- 538
26
votes
How to slow down clock speed of processor
If your concern is how efficient your software is, let me suggest a more engineering-oriented solution that will let you keep your MacBook running at full speed:
Use the profiler built into ...
- 361
26
votes
Accepted
How can I have 1805 threads when I only have 4 virtual CPUs?
Scheduling
Your 1,805 threads do not run simultaneously. They trade off. One core runs a bit of the thread, then sets it aside to execute a bit of another thread. The other cores do the same. Round ...
- 11.6k
24
votes
Accepted
What means SecTaskLoadEntlitlements failed error=22
You need a bit of introduction to understand what SecTaskLoadEntitlements really is/does:
An application (.app) in OS X is really a folder containing a number of files, including the actual program, ...
- 73.4k
24
votes
Accepted
Xcode 12.3 is not responding a few seconds after opening it
This is a recently reported bug with Xcode 12.3. I am not aware of any response from Apple yet, but you might be able to fix this issue by turning off the over-the-air test device builds.
Top Menu: ...
- 436
20
votes
How to monitor and control thermal CPU throttling in OS X?
There is an open-source menu bar app for monitoring CPU throttling (and temperature) called Hot: https://github.com/macmade/Hot/
brew install hot
It shows the information at the menu bar directly, ...
- 323
20
votes
Accepted
How to slow down clock speed of processor
I do not think it is possible to manipulate the minimum clock speed bar, simply because of the direct relation between power, frequency and the clock speed of a micro processor. Obviously the clock ...
- 384
20
votes
Cursor freezes for a split second around every 10 seconds
My cursor was also freezing intermittently and it was also related to my multi-screen display. I unplugged my monitors and replugged them in and this solved the issue.
I use a Macbook Pro and 2 Dell ...
- 201
20
votes
Why is my MacBook Air faster than my iMac?
One main difference between the two computers is that your MacBook Air has an SSD - a solid state drive - for data storage, whereas the iMac has an ordinary hard drive. SSDs are typically an order of ...
- 73.4k
19
votes
Accepted
How to stress a MacBook Pro Retina?
Consuming All the CPU Cores
The command below runs a yes instance for each CPU core and consumes a near maximum of the computer's processing capability:
CPU=$(sysctl -n hw.ncpu)
seq $CPU | xargs -I{}...
- 42.3k
18
votes
Accepted
MacBook Pro 2016 Left Click lag in games?
I found the solution after a long time searching....
As it turns out, a third party app called "Magnet" was causing the delay. Many other games have had similar issues due to this app running in the ...
- 261
18
votes
Accepted
Are there credible technical bases for reports of “Apple deliberately slows down older devices when new software is released”?
Apple uniquely controls and shapes the experience of iOS. If you do not trust Apple, do not buy an iPhone.
Considering the impact of Apple's past behaviour, Apple settles iPhone slowdown case for up ...
- 42.3k
18
votes
Are there credible technical bases for reports of “Apple deliberately slows down older devices when new software is released”?
It's true that Apple added code to iOS update 10.2.1 in January 2017 so that if your battery had degraded sufficiently, it would run slower, to avoid sudden shut-offs if the power rose too high for ...
- 30k
16
votes
Are there credible technical bases for reports of “Apple deliberately slows down older devices when new software is released”?
I just wanted to add a different angle to this:
The clerk warned you that the iPhone 7 is becoming an older model (released in 2016), and that you should take that into account when choosing what to ...
- 73.4k
15
votes
Accepted
How to fix mac os high sierra, freeze?
I was faced with the same dilemma, it seemed like my MacBook Pro (mid-2015) was 'freezing.' I stumbled across a the fix to it after seeing your post - you can read about it here: https://jrgarrigues....
- 308
15
votes
How to determine if my 2015 MacBook Pro can still handle current workloads?
Nobody except you cares for benchmarks. That was the wrong tree to bark up to.
What you need is specific use cases. "I need a new computer because task X must be done on the latest MacOS version, ...
- 261
14
votes
kernel_task hundreds of % CPU yet cpu frequency is being lowered
Apple documents this.
Activity Monitor may show that a process named kernel_task is using a large percentage of your CPU, and during this time you may notice a lot of fan activity. This process ...
- 229k
14
votes
Accepted
How can I verify if Apple is slowing down my phone because of an old battery?
iOS 11.3 brings iPhone Battery Health (Beta). This new feature made available in this update provides users with info about the health of their battery, allowing them to determine if the condition of ...
grg♦
- 195k
Only top scored, non community-wiki answers of a minimum length are eligible