wget is a robust command line application for downloading URL-specified resources. It was designed to work excellently even when connections are poor. Its unique feature, compared to curl which ships with macOS, for example, is that it is non-interactive so it can run in the background.
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- Can you install macOS Catalina on an external SSD connected to your Mac? Yes, it's definitely possible. However, since Apple initiated a relatively new partition scheme (APFS) with macOS High Sierra, the process is slightly different than with older versions of macOS.
- Telnet is an incredibly useful diagnostic and debug tool. I use it at some point nearly every day diagnosing SMTP connection problems, accessing old Cisco switches / routers on my internal private/secure network, connecting to serial consoles across a local/private network and more.
- Click Allow From Anywhere when prompted. Doing this will allow you to install software from unsigned developers without having to confirm from within this menu. If you don't install any unsigned software within 30 days, you'll have to re-enable this settings. Click the lock icon if you'd like to prevent further changes.
Back in Catalina, I had to both download and install the macOS client you linked AND follow the step by step in this document here. Now, with BigSur what happens (after installing the macOS client pack) is that I can start the router/switch in EVE-NG, click on it to open a connection and choose “Open with iTerm”. How to Install SecureCRT on macOS High Sierra / macOS Mojave / macOS Catalina. If you are preparing for Cisco exams with GNS3 on your Mac, you can use SecureCRT to configure the Cisco Switch or Router, and you can also use it to remotely administer an ADSL modem in your home.
There are 2 ways to install wget: via Xcode or via Homebrew and I will cover both methods since not everyone uses Xcode or Homebrew.
Installing Wget via Xcode
Installing wget on Mac via Xcode requires you to build the tool from source and the steps are the same on all a Mac versions:
First, install Xcodevia iTunes and then install Xcode command line tools with the command:
Download wget source code using curl:
Extract and navigate into the folder and run the configure command:
Make and test wget:
If you get an error when you run the configure command then run it with an SSL flag like so:
Remember to delete the now-unnecessary files after the installation is complete.
Installing Wget via Homebrew
Homebrew is a package manager for OS X that makes installing and managing applications a lot easier for Mac users.
There are alternatives like Fink and MacPorts but I prefer using Homebrew. Don’t worry if you don’t have it installed, I’ve got you covered:
Install Homebrew using the following command, it will also install Xcode’s command line tools if they aren’t already installed:
Next, install wget command-line download client.
How to Use Wget on Mac
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As long as a file or directory’s URL is publicly accessible, you can download it and files can be downloaded singly or recursively when downloading directories.
Downloading a single file
The syntax is simple. the wget command, -X to indicate the file path (unless you want to save the downloaded content to your current working directory), and the public link.
Downloading a directory
The -e robots=off flag tells wget to ignore restrictions in the robots.txt file which is good because it prevents abridged downloads. -r (or --recursive) and -np (or --no-parent) tells wget to follow links within the directory that you’ve specified. Voila!
While that is all that you need to know to use wget for downloading files, there are many other commands that’ll enable you to control its usage and you can access them within your terminal in wget’s man page or online.
Have you got any questions to ask or suggestions to make? Feel free to drop your thoughts in the comments section below and don’t forget to share.
Can you install macOS Catalina on an external SSD connected to your Mac? Yes, it's definitely possible. However, since Apple initiated a relatively new partition scheme (APFS) with macOS High Sierra, the process is slightly different than with older versions of macOS. This article shows you how to set up a new SSD with macOS Catalina that you can boot from.
Why Installing macOS Catalina on External SSD?
macOS can be installed on an external storage device by default, such as HDD, SSD or USB flash drive. And this priciple also applies to macOS Catalina. For permance consideration, external SSD is much better becaus of faster reading and writing speed. The good news is that external SSD is much cheaper than before and the price gap is much smaller.
Now, the big question is why you don't want to install macOS Catalina on your main hard drive. After all, if you're upgrading to macOS Catalina, you want your Mac to boot to it all the time, don't you? Not necessarily. There are several reasons why you might not want to disturb your current installation, whether it's Catalina or an older version of macOS. Here are some possible reasons.
● You might want to try macOS Catalina without having to uninstall and roll back to Mojave or High Sierra if you change your mind. Uninstalling and rolling back to an older version of macOS is time-consuming and a tedious process that is prone to errors, so you may not want the hassles that come with it.
● Your Mac (Mostly Mac Mini or iMac) is built upon on a HDD and it runs slowly. You are looking for a way to boost the performance without untouching the internal drive.
● Since there are bound to be bugs in early versions of any new OS, you might want to avoid the hassle of having it as your default OS. This way, you can update it as new versions are released, then install it as your main OS when you're happy with the stability of the software.
● You may want to have the SSD run macOS Catalina on more than one machine. Since your SSD is essentially an external drive that is portable, you may want to switch it between one Mac and the other. Instead of installing Catalina on both, you have the flexibility of simply connecting the SSD to one of the Macs when you want to boot from it.
● It's also possible that you want to run a different set of apps and, therefore, need more memory. If you use a larger-capacity SSD, this will allow you to load a ton of heavy apps like Photoshop and so on, which might not be possible with your current hard drive because it is already full of data.
How to Pick up the Right External SSD for Catalina
Mac computers are made different from PCs. It has its own hardware port and unique standards. So not all external SSDs are suitable for Macs. To maximize the performance of SSD, it should be USB 3.0 compatible, if you have enough budget, ThunderBolt port is more welcome as it has much faster reading and writing speed. Besides, the volume should be 128 GB or larger. Below is a list of best external SSDs for Mac:
Further reading: How to check hardware port on your Mac
- Adata SD600Q External SSD 240GB (USB 3.2, $39.16)
- SanDisk 500GB Extreme Portable External SSD (USB-C, $84.99)
- Samsung X5 Portable SSD 500GB (Thunderbolt 3, $199.99)
- LaCie Portable SSD STHK1000800 1TB (USB-C, $178.31 )
- G-Technology 0G06053 Portable External SSD 1TB (USB 3.0, $189.95)
- WD 500GB My Passport Go SSD (USB 3.0, $69.99)
- Seagate One Touch SSD External 1TB (USB 3.0, $144.99)
Notice: The SSD you are going to use or purchase should be compatible with your Mac.
Preparation before Getting Started
To instal Catalina on external SSD, there are quite a few things you should set up previously. The preparatory steps are very important because if you don't get them right, the time spent on the rest of the process will be completely wasted and you'll have to do it all over again. For that reason, make sure you follow the steps exactly as outlined. macOS Catalina is built on a different drive partition scheme, the APFS file system. This was introduced in Catalina for Mac but it's been in iOS for quite some time. In an effort to unify its desktop and mobile operating systems, Apple has now rolled out the new system to both branches of its core OS.
1. Download Catalina DMG File: For macOS installation, you have to create a bootable Catalina USB first. To do this, you need to get a copy of the Catalina dmg file.
Download link: http://www.mediafire.com/file/ /macOS_Catalina_DMG.rar
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2. Format External SSD to APFS: APFS is the file system that holds macOS Catalina installation. The SSD is formatted to exFAT when it is shipped. You can format the external drive to APFS with Disk Utility app.
Connect the SSD to your Mac and launch Disk Utility. Select the external drive in the left-side panel and click Erase. In the pop-up, name your drive, select APFS, and GUID Partition Map.
3. Backup important data on your Mac: To avid data loss, it is highly recommended backing up your important data on internal SSD with Time Machine or Cloud Drive.
How to Create macOS Catalina Bootable USB Installer
After completing the above preparation, it is time to get into the part for creating a bootable Catalina USB installer. This can be done easily with the help of UUByte DMG Editor, a cross-platform program for making bootable USB drive from macOS dmg file.
Step 1: Please download UUByte DMG Editor on a PC or Mac and follow the on-screen tips to install this utility on your computer..
Step 2: Plug in an external USB flash drive and eject other USB devices at the same time. Now, open UUByte DMG Editor and click Burn tab.
Step 3: In Burn page, click Browse button to add macOS dmg file you downloaded to the program. After a few seconds, you can see the USB drive in secord field.
Step 4: Set a name for the new volume and click Burn button to start writing Catalina DMG file to USB drive. The file is around 8GB so it takes about 10 minutes to finish the task. Please be patient!
Creating macOS Big Sur install USB on Windows 10 is simple with the help of UUByte DMG Editor. It is one of the best tools for managing DMG file on a Windows PC.
How to Install Catalina on External SSD
You have done all the crucial steps in above part and the final step is how to install macOS Catalina on External SSD. This process is quite simple.
First, connect the SSD to your Mac. Then restart your Mac and hold the Option key until you see the Apple logo. In the Startup Disk, click the external drive name.
When the boot resumes, you should boot into macOS Catalina installation wizard. At this stage, you should pick up the external SSD to install Catalina.
Another way to boot Catalina is from System Preferences. Here, go to the Startup Disk section, select your external SSD, and then hit Restart. Do not hold the Option or Alt key down if you're using this method.
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Troubleshooting If Catalina Installation Failed
USB not bootable: If the USB drive is not showing up in Startup Manager, this means the USB drive is not recognized as a bootable device. Please download Catalina DMG file from another source and burn it again with UUByte DMG Editor. Sometimes, the partition table is missing in corrupted or damaged dmg file.
Can not boot into Catalina partition after installation: On latest T2 chip, Mac does not allow booting from external storage device by default. You have to enable 'Allow booting from external media' in Startup Security Utility, where you can launch it in macOS Recovery by pressing and holding Command + R immediately at startup.
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Once you have macOS Big Sur installer USB ready, you can insert it into any Mac and run the program to install Apple's latest desktop operating system. Big Sur is officially coming in the fall and has a ton of updated features on nearly all fronts, including the OS interface, Safari, Siri, Messages for desktop, etc. But you should also know that since the currently available DMG is only a public beta tester version, it is bound to have bugs and other issues. If you're on the beta program, you can use the feedback app to let Apple know what the issue is. Unfortunately, that also means that there's nothing you can do about it if you're not on the beta program.