bootcamp: can I use boot camp to install Windows if I already have two versions of macOS?

I have a MacBook Pro with a 1TB SSD, it currently has two APFS volumes, one that I start for High Sierra (for when I need to use legacy software) and the normal one for Catalina.

Is it still possible to use the boot camp utility to install and start Windows or is it not a good idea? There is a lot of information about dual boot and dual operating systems, but I just wanted some clarification before going to ruin my machine and having to erase and restore everything.

Thanks for your time and consideration, any help is greatly appreciated.

usb – Logitech Webcam HD C270 not recognized correctly by macOS

I bought a C270 (in early February) that I use with my Mac. However Zoom and other software identifies it as USB-camera # 3 and the microphone is identified as Unknown USB audio device. When I connected it to a Windows 10 laptop, it was immediately identified as HD C270. I tried searching the Logitech website for a new controller or something, but there is none of that.

I find it a bit annoying, especially since I also have a cheap USB microphone that is identified as USB MICROPHONEI find it annoying that I can't see the proper labels in the selection dialogs.

This is how the device is displayed in system_profiler SPUSBDataType:

                Miscellaneous Device:

                  Product ID: 0x0825
                  Vendor ID: 0x046d  (Logitech Inc.)
                  Version: 0.12
                  Serial Number: A2CC4DD0
                  Speed: Up to 480 Mb/sec
                  Location ID: 0x14132100 / 20
                  Current Available (mA): 500
                  Current Required (mA): 500
                  Extra Operating Current (mA): 0

Is there a way to add my own tags to this device?

Can you sort folders by size in macOS?

Is there a way, without using a third party app, to sort C folders by size?

macos – Missing / usr / local / bin in $ PATH on Mac OS Catalina (10.15.4) when using ssh

I am using GNU / Linux to connect to Mac OS (zsh) via ssh. My goal is to automate some tasks by executing commands directly. However, it seems that $ PATH is different when connecting to a shell session and when trying to execute a command directly with ssh. To illustrate:

$ ssh -o StrictHostKeyChecking=no user@my_mac
% echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin

However, if I run the command directly:

$ ssh -o StrictHostKeyChecking=no user@my_mac 'echo $PATH'
/usr/bin:/bin:/usr/sbin:/sbin

My content /etc/paths it is:

% cat /etc/paths
/usr/local/bin
/usr/bin
/bin
/usr/sbin
/sbin

Y /etc/paths.d/ you have a single file containing /Library/Apple/usr/bin

I use by default for Catalina zsh and not bash and I do not have .profile or .bash_profile

What can be the reason for the $ PATH difference?

macos – Dynamic DNS Solutions for Mac OSX Catalina?

I saw that OSX supports RFC 3007 dynamic DNS update, however I couldn't find a provider that supports it.

Does anyone have any suggestions on a good provider?

I'm trying to remotely share / control my Mac's screen, but the only way to connect without authorizing the connection on the connected Mac is to use vnc: /X.X.X.X in Safari from the remote computer. This means that I will probably need a dynamic DNS server to publish the IP address of the Mac and possibly port forwarding on the home router.

Any suggestion appreciated.

macos – Mojave: Macbook Pro (2011) loads endlessly after password

so I try to fix this annoying problem of a fairly aged Macbook Pro (2011) with Mojave.

What have I done?
I created a TimeMachine backup to move from the old HDD to a new SSD. TimeMachine creation and import worked great and I can see the old user. Since there is currently no password for this user, all I have to do is press enter to start logging in. But here is the problem: the loading animation never ends and the login process runs endlessly.

I've already tried several things to fix this problem:
– Reinstall Mac OS
– CMD + OPTION + R + P to reset NVRAM and PRAM
– Leave it intact (more than 20 minutes) but without progress

Do you have any advice on how to fix this?

Thanks in advance 🙂

macos – are there any logs somewhere to show up when you're done sharing the screen?

For the past week, I've been doing a lot of remote access using Screen Sharing.app. Is there a place that registers when I have used it and for how long? I have searched Console.app but found nothing useful when looking for screen sharing.

macos – How can I find out what my HD space is slowly eating?

I had a very similar problem and decided to compile various methods to solve it. So below are those options and some of them I got from the answers already provided here. I understand this is a bit off the topic of the question, but is in tune with the answers. This has many parts and those are all softwares that you could try in some way.

It is generally a good idea to pay close attention to the use of sweat options below so the software can access each file, which will probably include some big the hidden ones


Here is a short list of apps to check disk usage:

  • GrandPerspective is graphic only, using the Treemap, you can measure files by logical or physical methods before scanning, show / hide package contents and change color scheme on the fly. You can also save the scanned data to archive or compare multiple windows.

  • Disk Inventory X also uses the Treemap graphical schema, but in conjunction with a list view of folders and files. The graphics are not as good as GrandPerspective nor the list as good as OmniDiskSweeper, but it does a good job mixing the two. It has a Finder plugin and most of the options among the 3 preferences. It is the most complex, but not all complete.

  • OmniDiskSweeper is not graphical and is very similar to the Finder column view. If you choose the folder or disk to scan, it will sort them based on disk usage after taking your time to calculate. Then you can simply delete (trash) everything that appears in the list.

So each has its advantages and highlights, I'm still not sure if there is one that stands out. They are all free.


There's also a different approach, from apps to scanning specific places and expected files for space usage in less than optimal ways. Basically, they put together some familiar things about the system that may be bloating your disk into one nice interface so you can see and decide what to remove.

  • CleanMyMac lists caches, logs, language files, universal binaries, development "junk", extensions, and applications. It scans through files and also uses some knowledge base you have. Great interface, easy to use. CleanMyMac has a Free trial that will only clean up to 500MB.

  • XSlimmer is very specific. That remove "unnecessary" code from "fat" binaries Y Delete unnecessary languages, as it says on the website. In other words, universal binaries use a lot of space to store files that run on different architectures and languages. Therefore, this removes them all so that they are reduced only to the needs of your computer. XSlimmer is currently discontinued.


Another approach is to look for duplicate files. There are many trading options, some may be better than those listed below, I have not tried them all. Anyway, I'm listing my choice of apps considering which ones I could test.

  • TidyUp is a well-known application in this regard. You can specify where to explore what type of duplicates. It offers basic and advanced modes, several different strategies and criteria.

  • MrClean is a free tool that simply scans folders for duplicates and throws them away. Very simple but efficient if you are sure of what you are doing.

  • Chipmunk scans for duplicates and lets you choose which ones you want to throw away. It offers a folder node view and you can select "delete all files in a folder that have duplicates elsewhere, or vice versa"As well as manual selection. It can take a long time to scan all the files, but it does a very decent job after that.

  • DupeCheck "drop a file and it will use your Spotlight index to see if you have a possible duplicate somewhere"This is this good open source application. It is not a great space cleaning tool at the same time, but over time it helps you keep your space clean.

  • DuplicateFileSearcher from website: "is a powerful free software utility that will help you find and remove duplicate files on your computer. It can also be used to compute MD5 and SHA hashes. The software runs on Windows, Linux, Solaris and MacOS.". Enough talk.


Below, I will briefly discuss a similar approach by citing relevant parts about two other things that can be done to find missing disk space, without installing anything new, just using the command line (Terminal).

This (long but good) is from the MacFixIt forums (go there for more options and details):

In most cases, there really are files that take up part of the volume, but the files are invisible in normal Finder use.

Using the Go To Finder Folder function (on the Go menu), notice the content sizes of these folders by pasting these path names:

/private/var/vm 
/private/var/log 
/Volumes 

The / private / var / vm directory contains the swap files used by virtual memory. New ones are created as more data is exchanged from RAM to the hard drive. The entire creation process begins at every reboot or reboot; do not try to remove them yourself. Check the total size of all swap files, right after booting, and as the disk fills up. In Panther, the first two swap files are 64MB, then each new one is twice the size of the previous one (128MB, 256MB, 512MB, 1GB) up to a maximum size of 1GB. In Tiger, the first two swap files are 64MB, the next is 128MB, and the additional swap files are 256MB.

If you don't run the daily, weekly, and monthly maintenance scripts (either using a utility or running the sudo periodic daily, sudo periodic weekly, and sudo periodic monthly commands in Terminal), the records on the startup volume may become too large. If it fails frequently and is logging you may have a very large file in /private/var/log/system.log.

Files in / Volumes must be aliases for their mounted volumes. Do not remove these aliases, because everything you do happens to the contents of the corresponding volumes. If you are not sure that you can browse this folder smoothly, before you start, properly unmount any volume other than the boot volume, if the missing disk space issue only affects that volume. External FireWire drives can be disconnected after proper removal.

Sometimes, backup programs that cannot find a target (or target) volume intended for a backup create a folder with the same name as the target and place the folder in the / Volumes directory. There are cases where the entire startup volume has been backed up to a folder inside / Volumes. If the amount of missing space is approximately the size of your User Box, then such a backup is likely to be the explanation. If you use Carbon Copy Cloner or another backup or clone utility and have your preferences set to create a backup on a schedule, and the intended destination volume is not mounted or is inactive at the scheduled time, the backup it is created in the / Volumes directory.

To check the size of the normally invisible / Volumes directory on the active startup volume, open a new Finder window. Select the startup volume from the list on the left, then choose the column view (the one to the right of the three views). From the Finder's Go menu, choose Go To Folder and paste:

/Volumes 

The / Volumes directory becomes visible in the Finder; Find its size by selecting it and typing Command I. My directory / Volumes is said to be 12K.

This one is from the Mac OS X Hints forums (not much else to see there):

You may want to run a du in the terminal to see what's going on. This may take a few minutes to execute.

An example would be to open terminal.app and then run these commands:

sudo du -h -d 1 -c /

Enter your password when prompted and then release it, it will take a few minutes to run, so be patient.

du means disk usage. There is also df. I like to include the -x to the previous command:

sudo du -cxhd 1 /

By adding to the command line option, you can use an automation service to open any application. With this you will get different (and more complete) results in the GUI.

OR, if you are on a Power PC, using Rosetta or anything before Snow Leopardyou can mix any of the applications mentioned above with Pseudo. It is a small application to open things as administrator. Imagine it as a GUI for sudo.


Finally, there is a complete newbie guide to "The X Lab" that I am not going to quote here because it is too long.

MacBook Pro 2017 has no startup disk when upgrading MacOS beyond Sierra

My 15 "2017 MacBook Pro displays a flashing question mark every time I try to upgrade to a newer operating system. The installation process seems completely normal until it is last restarted and boots into a flashing folder. When I look in recovery I see my SSD and the MacOS base system, first aid on any of these does nothing. From the startup disk inside recovery I don't see any available disks. Starting while holding the option shows the SSD as EFI boot, and the boot It shows a slightly different installer that also fixes nothing.

I can restore Internet to Sierra if I want to, so I keep doing it and have tried updating to High Sierra, Mojave and Catalina, all of which have had the same problem. I've rebooted the RAM and SMC, I've done clean installs and reinstalls on every operating system with and without first aid on every visible drive beforehand, the only way I can boot the laptop is by doing an internet recovery back to Sierra, at which point it works perfectly. Completely erasing the hard drive and trying clean installs of each operating system has also not worked through internet installation or usb installation. I've tried some recommended terminal commands for this kind of problem, but I don't remember exactly what they were (several were about mounting and mounting drives). I am not comfortable or familiar with the terminal at all.

I don't care about data recovery or anything like that, I just want a newer operating system because Sierra no longer supports a game my friend plays a lot. At this point I am a little lost. I'm a Windows person fixing this for a friend, so the fact that a clean install didn't work is a little annoying. Any help or advice is appreciated, thanks.

How to add a MacOS domain user

Is there a difference between the new Mac:

  1. Create administrator + configure
  2. Rate a new Mac in the domain
    • Create new user with AD credentials in System Pref OR
    • Add a new user directly to AD with "Change User" with "Name" and "Password"

Longer version:

There is a system preference below Users > Login Options : Display Login window as List of Users OR Name and Password

The default is the first. If you forgot to verify Name and PW the new domain user comes to his office, logs out the administrator, there is no way to add a new user. I helped in this situation, by creating a new user, with the domain credentials, log out and log in to the new domain user.

My boss is not happy with this procedure, he is even mad at me, saying that a local user is not a domain user. There will be a lot of trouble with this procedure (there were issues so far; I configured at least 20 new Macs like that).

My question: is there a difference between adding a new user in Prefs and logging into AD or creating that user directly with Name and PW?

I hope this question is clear. Thank you in advance for your understanding

marek