"....not optimized for your Mac" is displayed

Article ID: ART173550 | Date published: 01/22/2019 | Date last updated: 05/29/2019


This message may occur when installing a 32-bit application into macOS running 64-bit.


An alert message is displayed in the form of "application name not optimized...." in macOS High Sierra 10.13.4. and later

Details are shown below.



An alert message is displayed when a 32-bit application is launched. This message appears only once when the application is initially launched,


Even when the application is launched in the background, this warning message appears only initially.


Support page of Apple




Click OK, and close the message. There is no problem with the subsequent operation. 

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