Legacy System Extension (displays on macOS systems)

Problem

In macOS Catalina 10.15.4 and later, Apple displays the notification below when McAfee applications load system extensions on the macOS system. In 2019, Apple informed developers that macOS Catalina is the last macOS that fully supports legacy system extensions. McAfee is working on this transition in our applications.

The macOS systems display the following message until the transition is completed:

Legacy System Extension
Existing software on your system loaded a system extension signed by "McAfee, Inc." which will be incompatible with a future version of macOS. Contact the developer for support.

This message displays when a legacy system extension is loaded for the first time. It also displays periodically while the extension remains in use.

For more information about this notification, see the following Apple Knowledge Base article: https://support.apple.com/en-hk/HT210999.

Solution

Click OK and close the Legacy System Extension notification. The notification does not impact product functions.

This article will be updated as McAfee products transition from using legacy system extensions.

ENSM 10.7.5 is the version that has transitioned away from the legacy system extensions to the new Endpoint Security APIs and network extension.

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McAfee product software, upgrades, maintenance releases, and documentation are available from the Product Downloads site.

NOTE: You need a valid Grant Number for access. See KB56057 - How to download Enterprise product updates and documentation for more information about the Product Downloads site, and alternate locations for some products.

Affected Products

Data Loss Prevention Endpoint 11.6.x
Data Loss Prevention Endpoint 11.5.x
Data Loss Prevention Endpoint 11.4.x
Data Loss Prevention Endpoint 11.3.x
Endpoint Security for Mac Firewall 10.x
Endpoint Security for Mac Threat Prevention 10.x
Endpoint Security for Mac Web Control 10.x
File and Removable Media Protection 5.1.x
File and Removable Media Protection 5.0.x (EOL)
Known Issue/Product Defect
Management of Native Encryption 5.x
Management of Native Encryption 4.x
McAfee Active Response 2.x
McAfee Client Proxy 3.x
McAfee Client Proxy 2.5.x
McAfee Client Proxy 2.4.x
McAfee Client Proxy 2.3.x

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This article is available in the following languages:

English United States
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Portuguese Brasileiro

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Legacy System Extension (displays on macOS systems)

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Legacy System Extension (displays on macOS systems)

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