All about _501 Files

The _501 file type is primarily associated with Mac OS X.

_501	File extension: _501
	File type:	Mac OS Metadata

What is an _501 file

_501 files mostly belong to Mac OS X. A ._501 file is a metadata file used by Mac OS X. It stores extended attributes of files, including file system metadata like file permissions, creation/modification timestamps, resource forks, and Finder information such as icon positions and labels. These files are typically hidden from the user in the Finder interface and are essential for the proper functioning of the operating system. They are not meant to be opened or edited directly by users, as doing so could corrupt the file system.

How do you open _501 files?

You need a suitable software like Mac OS X to open an _501 file. You need a suitable software like Mac OS X to open an _501 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your _501 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a _501 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online _501 Text Viewer

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Online File Viewer

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._501 File Not Opening? How to Fix It:

Because ._501 files can originate from different systems, they aren't universally openable.

Identify the Source: These are typically Mac OS Metadata files created when a Mac user copies a file named "501" to a FAT32 USB drive or a Windows network share.
Check the Header: Open the file in a hex viewer to inspect its first bytes:
- 00 05 16 07: Confirms it is a standard AppleDouble resource fork.
- Readable text: Suggests it may be a renamed log or configuration file instead.
Use the Original Software: You usually need the original system to utilize them; use macOS Finder, the Mac dot_clean utility, or ask the sender for the actual file without the ._ prefix.
Use this Webpage: Drag and drop your ._501 file into our viewer to detect its format, extract readable metadata, and preview the contents.

Technical Data for _501 File Extension

File classification:

Metadata File

Related files:

wal, kext, lproj, mpkg

an _501 Mac OS Metadata is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with _501 files

Associate the _501 file extension with the correct application.
Update your software that should actually open mac os metadata files. Because only the current version supports the latest _501 file format. Search, therefore, e.g. on the manufacturer website after an available Mac OS X update.
To make sure that your _501 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your ._501 file online - secure, fast, and no downloads needed.