How do I use the ScanSnap S1100 with multiple user accounts on the same computer?

Applies to: ScanSnap S1100 Portable Document Scanner
Last updated: 4 February 2026

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Problem

The ScanSnap S1100 works correctly for one user account on a computer but not for others. Another user may not see the scanner in ScanSnap Home, profiles may be missing, or scans may save to unexpected locations. This is common on shared family computers, office workstations or systems with both standard and administrator accounts.

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Solution

ScanSnap Home is installed system wide, but scan profiles, permissions and save locations are user specific. Each user account must complete initial setup, grant permissions and configure profiles independently. Once this is done, the ScanSnap S1100 can be shared reliably without reinstallation.

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Step-by-step instructions

Confirm ScanSnap Home is installed for all users

1. Log in using an administrator account.
2. Confirm ScanSnap Home is installed and launches correctly.
3. If ScanSnap Home is missing for some users, reinstall it using an administrator account.
4. Restart the computer after installation.

The software itself should be installed once, not per user.

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Log in to the second user account and initialise the scanner

1. Log in to the additional user account.
2. Connect the ScanSnap S1100 via USB.
3. Open ScanSnap Home manually.
4. Wait for the scanner to be detected.
5. Allow any first run setup or registration prompts to complete.

Each user account must initialise the scanner separately.

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Grant permissions on macOS per user

macOS permissions are account specific.

1. Log in to the affected user account.
2. Open System Settings > Privacy & Security.
3. Enable ScanSnap Home under Full Disk Access, Files and Folders, and Accessibility.
4. Quit and reopen ScanSnap Home.

Permissions granted for one user do not apply to others.

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Configure scan profiles for each user

1. Open ScanSnap Home in the user account.
2. Review existing scan profiles.
3. Create new profiles or customise defaults as needed.
4. Confirm save locations point to folders owned by that user.
5. Perform a test scan to confirm correct behaviour.

Profiles are stored per user and are not shared automatically.

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Check default save locations

1. Open ScanSnap Home settings.
2. Review the default save folder.
3. Avoid saving to another user’s home directory.
4. Choose Documents or a dedicated Scans folder within the current user account.

Incorrect save locations can make it appear that scans have failed.

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Avoid fast user switching during scanning

1. Ensure only one user is logged in and active when scanning.
2. Do not switch users while a scan is in progress.
3. Close ScanSnap Home before switching accounts.

USB devices do not always transfer cleanly between active sessions.

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Optional methods or tools

• Shared network folders
  Use a shared network location if multiple users need access to the same scanned documents.
• Profile naming per user
  Include the user name in profile names to avoid confusion on shared systems.
• Administrative profile setup
  Create a standard set of profiles manually for each user to maintain consistency.

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Best practices or tips

• Treat scan profiles as user preferences rather than system settings.
• Recheck permissions after macOS updates for each account.
• Avoid sharing one user account for scanning on multi user systems.
• Restart the computer if scanner detection behaves inconsistently between users.
• Keep user workflows separate to reduce accidental overwrites.

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Using the ScanSnap S1100 on a multi user computer works well once you understand that ScanSnap Home behaves differently for each account. The scanner hardware is shared, but profiles, permissions and save paths are not. Most issues arise when users assume setup is global rather than per account.

By completing initial setup and profile configuration for each user, the S1100 becomes just as reliable on shared machines as it is on single user systems. Clear save locations and sensible profile naming help prevent confusion and ensure everyone gets predictable scanning results.