Kioxia USB flash drives will no longer support old Mac operating system version

Kioxia stated that Kioxia USB flash drives will no longer support the old Mac operating system version. Kioxia declared the notice that our USB flash drives will no longer support the following Mac operating system versions after June 30, 2021.

• Affected USB flash drives: listed below
• Mac OS version no longer supported: OS X v10.11

According to Kioxia, if you are using a version of the Mac operating system that no longer accepts support, it is recommended that you update it. If you are not sure how to update your Mac operating system, please contact Apple for assistance.

(Source)