mac – MacOSX Big Sur – Terminal ZSH Shell Command’s Execute Sometimes With “!” Exclamation Symbol In Front

Is this normal behavior for MacOS Big Sur ZSH (Z Shell) terminal behavior? Sometime’s shell commands such as find and or launchd as just a simple example execute properly. This is with the exclamation symbol “!” in front, leading with the expected output and no privilege escalation.

For example, running: !find / will still work.
Or !sudo will execute.

But !echo '@' will not. But lead to the next command sometimes.

Output for !echo

zsh: event not found: echo

Output for !launchd


launchd cannot be run directly.

It seem’s weird !sudo output’s sudo syscallbypid.d

backup – iCloud Notes – back up to Time Machine or Optimise Mac storage

my original question was,

are my iCloud notes automatically backed up to Time Machine?

online I came upon the answer, yes, as long as Optimise Mac Storage is turned off

is this true?

But Optimise Mac Storage means full content of the iCloud Drive will be stored on the Mac

So it seems that’s already a way to backup the iCloud

Does this mean I have to choose whether to back it up to the Mac or to Time Machine ?

Which would be better ?

Thank you !

How to convert HFS+ partition to APFS on Mac?

After struggling with deleting Ubuntu from my Mac alongside with macOS, after deleting EFI volume it became free and unused. How can I convert it to APFS again and include that in my HD storage?

here is the screen.

Disk structure

iphone – MacBook M1 Big Sur crashes every time when I open “About This Mac -> Storage -> Manage”

Background: I’m using a MacBook Pro with M1 chip and Big Sur V11.1 (got it last month). One thing really annoys me is that when I connect my iphone, sync starts automatically and it takes up 20GB to when all iphone files are backed up.

Issue: So I wanted to delete the sync files using “Reduce Clutter” in “About This Mac -> Storage”. It worked fine for two weeks after I purchased the MacBook, but recently it starts to crash every time when I open “About This Mac -> Storage -> Manage” and I wasn’t even able to get the time to click “Review Files” under “Manage”. I tried to restart the system but had no luck at all.

Help: Does anyone else encounter the same issue? How to resolve it? Is there a way (say, command line) to delete synced iphone files without clicking “About This Mac -> Storage”?

“Manage-> Review Files” is a really convenient way to view and remove redundant files to save storage. It would be great if there is a way to revive that functionality if possible.

Thanks in advance!

Storage -> Manage"" />

disk utility – How to use internal HDD as a file sharing drive if I boot from external SSD on mac mini?

I’m running Mojave 10.14.6 on mac mini late 2014.

It has internal hdd drive. I bought an external ssd to speed things up and run everything from it, and use internal hdd as a data storagetime machine

I installed OS on ssd and am running the mac from it, but I can’t seem to erase the internal hdd drive. When trying to partition it in Disk utility I’m getting an error

The volume “osx” on disk1s1 couldn’t be unmounted because it is in use by process 82 (securityd)

After this error happened, disk utility shows that hdd has two partitions, 500gb each (that’s how I set it up on ‘partitioning’ step), but I can see only the partition that was there before, no new partition that I added. Might sound confusing – please see the screenshots here.

Now, I’m very sure that I run OS from external SSD, so I don’t understand why any process would use internal hdd and what should I do from now on.

So the question is, how do I use internal hdd as a data storage drive, and erase the OS from it?

macbook pro – Mac heating up when conencting to an external display

macbook pro – Mac heating up when conencting to an external display – Ask Different

icloud – New Macs keep asking about old discarded Mac credentials

I have only been using modern Macs for a year or so now. I was due to get a 2019 MBP from work in early 2020, so I got a 2009 MBP a few months before that to orient myself.

I created an Apple ID and an iCloud account on the 2009 MBP. With a little difficulty, I was able to apply those credentials to the semi-locked-down 2019 MBP from work.

Since then I have

  • done a fresh install of the 2009 MBP
  • left the previous employer, returned the 2019 MBP, and started a new job
  • bought a M1 MBA

During the 2009 MBP reinstall and the M1 MBA setup, I was asked for the login password on the 2019 MBP from my former job. I still remembered it, but that kinda freaked me out.

Now I’m about to get a new Intel MBP from the new job. I don’t want the credentials from the previous 2019 MBP to be associated with my personal M1 MBA or the new job’s Intel MBP in any way.

Does this make sense to any of you? How can I undo those links and not create any new links from the surrendered 2019 MBP to any future Macs I get?

mac – Error when mining with MacMiner

mac – Error when mining with MacMiner – Bitcoin Stack Exchange

macos – What exactly are the files . and .. on mac?

In practical terms, the folders named . and .. refer to the current folder and its parent folder respectively. For the root directory (referred to as /) the .. name simply refers to itself.

The “.” and “..” names are special in that they do not necessarily represent something actually stored in the file system on the disk, like other names. In some file systems there are actually hard links named “.” and “..”, but other file systems do not store them as such.

Similarly on modern operating systems, like macOS, it is possible to mount several file systems onto the same folder structure. At the boundaries of such intersections, the “..” does refer to a link stored inside that file system, but rather refers to a folder in a completely different file system.

In those case these names are purely virtual, while still providing the same functionality.

The presence of these names are actually dictated by the POSIX standard for operating systems, which macOS has been certified against since 10.5. In particular the standard specifies that:

The special filename dot shall refer to the directory specified by its predecessor. The special filename dot-dot shall refer to the parent directory of its predecessor directory. As a special case, in the root directory, dot-dot may refer to the root directory itself.

When using the command line interface, you’ll quickly become used to the .. name, as you often use commands like cd .. to go the parent folder.

The . name serves an important function in terms of security, as it is used to indicate to the shell (the command line interface) that you want to run a program located in the current folder instead of a system supplied command in another location. Imagine that we did not have the . name, and the system simply started the program in the current folder without having it explicitly stated – then a malicious user could add programs with names of common commands to folders on the computer, and when another user came across this folder and intended to run a common command (such as ls for listing files or cd for changing directory) they would instead be starting a malicious program.

Historically these names . and .. have been used on many different operating systems, including for example Windows and Linux. It originates from the Multics operating system (originally from 1969), which was the first operating system to feature a hierarchical file system. Multics was one of the main inspirations behind what eventually became Unix, and in the development process they places files according to a “directory” (current folder) and to “directory’s directory” (parent folder). These terms were abbreviated ‘d’ and ‘dd’, and were eventually pronounced ‘dot’ and ‘dot-dot’ – making way for their current representation

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