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On your Mac, select an item, then choose File Get Info. Click the lock icon to unlock it. Enter an administrator name and password. In the Sharing & Permissions section, do any of the following: Add a user or group: Click the Add button below the list, select a user or group, then click Select. Remove a user or group: Select the user or group, then click the Remove button below the list. Nov 15, 2019  if you get the message 'TurboTax cannot be opened because Apple cannot check it for malicious software' then that is caused by the Apple 'Gatekeeper' introduced with OS X 10.15 (Catalina). That has nothing to do with TurboTax and will happen for.

1. Press the power button on your Mac. Every Mac has a power button, usually marked with a power symbol . Then check for signs of power such as these:
   • Sounds, such as from a fan, hard disk, or other startup sound
   • Lights, such as from a backlit keyboard, Caps Lock key, or sleep indicator light
2. If your Mac has no signs of power, start by making sure that it's receiving power:
   • Make sure that your power cable is undamaged and securely plugged into your Mac and a working electrical outlet. If you're not sure about the outlet, test it with a lamp or other device.
   • If you're using a Mac notebook, make sure that it's using the correct power cable and adapter, and that it has been plugged in for about 5 minutes, which is long enough to provide a usable battery charge. Learn how to troubleshoot USB-C power adapters or MagSafe power adapters.
   • If you're using an external display, make sure that it's turned on, securely connected to your Mac, and isn't experiencing any video or display issues.
3. Then try these solutions, whether or not your Mac has signs of power:
   • Press and hold the power button on your Mac for 10 seconds, then press it again.
   • Reset the System Management Controller (SMC).
   • Make sure that your display's brightness is turned up. Mac notebook computers have a Brightness Up key on the built-in keyboard.
   • Unplug all accessories from your Mac, including printers, drives, USB hubs, and mobile devices. (You could have an issue with one or more of those devices or their cables.) Once more, press and hold the power button for 10 seconds, then press it again.
4. If your Mac has signs of power but the screen remains blank, try the steps for when your Mac starts up to a blank screen.

If you still need help, please contact Apple Support.

Most files that you download from the Internet usually come in an archived format and have one of the formats used for archived and compressed files. Opening these ZIP, RAR, TAR, BIN, and EXE files on a Mac may seem impossible in the first try as your machine is just not compatible with these formats by default.

Trying to open these incompatible file formats will only throw errors on your screen letting you know the file you’re trying to open can’t be opened. Since these file formats are some of the popular ones and you likely come across them every now and then, you’ll want to do something to make your Mac compatible with these formats.

Luckily, there are multiple ways to add support for the aforementioned file formats to your Mac.

Open ZIP, RAR, TAR, BIN, And EXE On Mac With The Unarchiver

If you’re looking for a single app or utility that can handle all of the file formats mentioned above, The Unarchiver is the one that can do it all. It’s an amazing piece of free software that adds support for basically all of the archive formats out there and lets you extract them on your Mac machine.

• Launch the App Store on your Mac, search for The Unarchiver, and install it on your machine.
• When it’s installed, you’ll need to set it as the default app for your unsupported file formats. To do this, first launch the app by clicking on Launchpad, searching for The Unarchiver, and clicking on the app.

• Most likely you’ll land in the Preferences pane for the app. If you don’t, click on the The Archiver menu at the top and select Preferences to get to the pane.

• Make sure you’re inside the Archive Formats tab as this is where you can choose what formats the app should open on your Mac. Select all the ones you want the app to open and you’ll be all set.
  
• If you don’t get the option to select file formats, you’ll need to set the app as the default app for each file format manually. To do this, select any file with one of the formats mentioned above, right-click on the file, and select Get Info.

• When the Get Info menu opens, find the option that says Open with. Use the dropdown menu to select The Unarchiver from the list and then click on the button that says Change All. It’ll associate the app with all the files having the format as your current one.

Next time you double-click on your file, The Unarchiver will automatically launch and open the file for you.

Autofill type software on mac. You’ll need to do the above steps for each file format you want to open with the app.

Open ZIP On Mac Without An App

Since ZIP is an extremely popular and widely used format, macOS had to make an exception and include it in their supported file formats. You can indeed open ZIP on Mac without the need to install any third-party apps.

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Using Graphical User Interface:

• To open a ZIP on your Mac machine, locate the file using the Finder.
• Double-click on the ZIP file and it’ll be extracted in the same folder.

You’ll then be able to view the extracted contents of the archive.

Using Terminal To Open ZIP On Mac

The Terminal app also supports extracting ZIP archives without installing anything on your Mac.

1. Launch Terminal using your preferred way on your machine.
2. Type in the following command and hit Enter. It’ll set your desktop as the destination folder for the extracted files.
   cd desktop

• Type in the following command replacing sample.zip with the actual name and path for your file. You can drag and drop your file onto the Terminal and the path will be added.
  unzip sample.zip

Your ZIP file contents should now be available on your desktop.

Open RAR On Mac Using Two Methods

If it’s just the RAR format you want to open on your Mac, you have two ways to do it.

Using Extractor To Open RAR On Mac

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There’s a free app on the App Store that lets you extract RAR as well as a few other archive formats on your machine.

1. Launch the App Store, search for Extractor, and download it to your Mac.
2. Open the app and you’ll see an interface asking you to add an archive. Drag and drop your RAR archive onto the app and it’ll open it for you.

Using Terminal To Open RAR On Mac

You can open RAR files with Terminal as well but you’ll need to first install a utility.

• Launch Terminal on your Mac.
• Type in the following command and hit Enter. It’ll install Homebrew which is a software management system.

• When Homebrew is installed, run the following command to install a utility called Unrar.
  brew install unrar
  
• Wait for the utility to install. When it’s done, use the following commands to open your RAR file on your Mac. Be sure to replace sample.rar with your own RAR file.
  cd desktop
  unrar x sample.rar

Open TAR On Mac Using Just The Terminal

Just like ZIP, Mac has built-in support for TAR as well and you can open TAR files on your Mac without installing any utilities.

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• Open Terminal on your Mac.
• Type in the following command and press Enter. Replace sample.tar with your own TAR file.
  cd desktop
  tar -xzf sample.tar

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It’ll decompress the contents of your TAR archive to your desktop.