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What is an ISDATA file? An ISDATA file is a cache file created and used by macOS icon services. It contains cached icon data, which macOS uses to load icons more quickly. ISDATA files' filenames always consist of a UUID (such as 1AEDA0FE-C8DB-52F8-3A88-57A134262EB1 ) followed by the .isdata extension.

More Information ISDATA file open in Apple TextEdit MacOS stores ISDATA files in the following directory: Macintosh HD/​Library/​Caches/​com.apple.iconservices.store Typically, users cannot access this directory (to prevent them from accidentally moving, modifying, or deleting system files). If you do access the com.apple.iconservices.store directory, you will likely find thousands of ISDATA files. Are ISDATA files malware? ISDATA files stored in the com.apple.iconservices.store directory are not malware. They are legitimate system files that macOS uses to load icons more quickly.

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.ISDATA File Extension

Icon Services Data

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What is an ISDATA file?

An ISDATA file is a cache file created and used by macOS icon services. It contains cached icon data, which macOS uses to load icons more quickly. ISDATA files' filenames always consist of a UUID (such as 1AEDA0FE-C8DB-52F8-3A88-57A134262EB1 ) followed by the .isdata extension.

More Information

ISDATA file open in Apple TextEdit

MacOS stores ISDATA files in the following directory:

Macintosh HD/​Library/​Caches/​com.apple.iconservices.store

Typically, users cannot access this directory (to prevent them from accidentally moving, modifying, or deleting system files). If you do access the com.apple.iconservices.store directory, you will likely find thousands of ISDATA files.

Are ISDATA files malware?

ISDATA files stored in the com.apple.iconservices.store directory are not malware. They are legitimate system files that macOS uses to load icons more quickly.

How to open an ISDATA file

ISDATA files are not meant to be opened. MacOS loads and uses data from ISDATA files as needed.

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Updated: November 16, 2023

FAQ

What is an ISDATA file?
An ISDATA file is a cache file created and used by macOS icon services. It contains cached icon data, which macOS uses to load icons more quickly. ISDATA files' filenames always consist of a UUID (such as 1AEDA0FE-C8DB-52F8-3A88-57A134262EB1) followed by the .isdata extension.
How do I open an .isdata file?
ISDATA files are not meant to be opened. MacOS loads and uses data from ISDATA files as needed.