These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
Download macOS
Find the appropriate download link in the upgrade instructions for each macOS version:
Mar 12, 2020 If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar. Select Install macOS (or Install OS X) from the Utilities window. Universal driver for Mac OS X 10.x.x. Only one driver for many Wireless USB Adapters on the chip Realtek. The package includes: 1.RtWlanU.kext 2.Wireless Network Utility 3.Icon app in the status bar and a separate utility to delete old files. Compatible with.
macOS Catalina, macOS Mojave, ormacOS High Sierra Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
OS X El Capitan El Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.
Use the 'createinstallmedia' command in Terminal
Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
Open Terminal, which is in the Utilities folder of your Applications folder.
Type or paste one of the following commands in Terminal. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume. Catalina:* Mojave:*
High Sierra:* El Capitan:
Press Return after typing the command.
When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created.
When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.
* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument, similar to the way this argument is used in the command for El Capitan.
Use the bootable installer
After creating the bootable installer, follow these steps to use it:
Plug the bootable installer into a compatible Mac.
Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery. Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it.
Choose your language, if prompted.
A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:
Catalina:
Mojave:
High Sierra:
El Capitan:
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Usb Wifi For Mac Os X
From TP-Link: Hello, I know some of you updated to Catalina 10.15 of your Mac, and need the driver for it. Generally speaking, the TP-Link official driver for Mac 10.15 will be released in a month after the official 10.15 OS version came out. That is to say, the driver of TP-Link network adapters released by TP-Link for Mac 10.15 will arrive in the middle of November. Please wait with patience and keep your eyes on our TP-Link official web site for the updates. https://www.tp-link.com/support/download/ Currently, there has a beta driver for Mac 10.15 on Github which is available for Realtek network adapter according to our test, please have a try to install it temporarily until the official TP-Link driver released: https://github.com/chris1111/Wireless-USB-Adapter-Clover