If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos. Published Date: March 08, 2021. Elementary OS is elegant and has great multi-user support, including parental controls. Jason Evangelho. Ubuntu 18.04 and elementary OS presented a perfect looking desktop out of the box, but.
Start up from macOS Recovery
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
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Apple silicon
Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
Intel processor
Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.
If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Follow these guidelines during installation:
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
After installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
- On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
- If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.
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You can also use these methods to install macOS, if the macOS is compatible with your Mac:
- Use the App Store to download and install the latest macOS.
- Use the App Store or a web browser to download and install an earlier macOS.
- Use a USB flash drive or other secondary volume to create a bootable installer.
Use these tasks to help you resolve problems that occur when you scan into Acrobat on Mac OS.
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The latest version of Acrobat can be more compatible with the operating system and hardware drivers. Before you install an update or upgrade, make sure that the system meets the minimum requirements. You can download the updates from the Adobe website at www.adobe.com/downloads/updates.
2. Install or reinstall the latest version of the scanner driver.
An out-of-date version of the scanner driver or a damaged driver file can cause scanning issues in Acrobat. Download the latest version of the driver for your specific scanner model from the scanner manufacturer's website. Then install or reinstall that version of the driver.
If TWAIN file is missing for any scanner, Acrobat doesn't populate the name of the scanner in the scanner list. However, if a TWAIN file is damaged, you can get an error.
Note: On Intel-based Macintosh computers, Acrobat 8 and 9 only supports Universal Binary TWAIN drivers. To determine whether your installed scanner driver is a Universal Binary driver or a PowerPC driver, do the following:
In Finder, navigate to /Library/Image Capture/TWAIN Data Sources.
In the General section of the Get Info window, look at the information beside Kind. You see either PowerPC or Universal after the word Package. If there is no TWAIN source, Acrobat can’t scan directly using the scanner.
3. Test the scanner with Image Capture or the software that was bundled with the scanner.
Verify that the scanner works by scanning with Image Capture. Image Capture s a standard Mac OS X application installed by default in the Applications folder. You can also try scanning with the software that was bundled with the scanner.
If the problem recurs in a different application, then contact the scanner manufacturer for support.
Image Capture uses Image Capture protocol, while Acrobat on MAC uses TWAIN protocol by default. There are scenarios where things work with Image Capture, but not with Acrobat. Don’t compare Image Capture and Acrobat TWAIN behavior. Acrobat has ICA support on MAC 10.7 for now with Acrobat XI only. You can switch to Image Capture protocol in Acrobat and compare results of Image Capture scanning with Image Capture application.
4. Scan with the scanner set to a different color mode.
Scanning into Acrobat in some color modes can cause problems when using certain scanners. For instructions on changing the color mode, see your scanner's user's manual.
5. Scan while logged in with the root user account.
The root user, or superuser, is a special user account in Mac OS X that is used for specific administration or monitoring tasks. By default, the root user account is not enabled. Log in, open Acrobat and try to scan.
Always log out of the account and disable it when you have finished using it.
6. Scan while logged in to newly created administrator user account.
A damaged file or incorrect permissions in your current user account can be the cause of your scanning problem. Create a user account, log in to it, open Acrobat and try again to scan.
For instructions, see Install or run an Adobe application from within a new user account (Mac OS X).
If the solutions above don't work, then use Image Capture or the software that was bundled with your scanner and scan to a TIFF file. Then use Acrobat to convert the TIFF file to PDF.