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Thank you Flood for your reply. Here are some answers for your questions: MAC OS version?--- Mac OS Mojave, version 10.14.6 Has a Applications incompatible with Kaspersky Internet Security 20 for Mac check been run?--- No as far as I know When “KIS blocking wifi ” problem happens, are there any visible errors? If “yes, visible error”, may we have image(s) please? ---No visible error at all, Just drop out by itself IF KIS is disabled, do the wifi dropouts stop?---I just tried, No dropout at all when I disabled KIS In KIS Reports, are there any wifi or network events that reflect “KIS blocking wifi ” ?--- Nothing shown in “Network attack blocker”, but there are something blocked or detected in ‘website tracking”. They are all normal website, such as Kaspersky.com and youtube. Thank you. hope you can find a solution!

My KIS for Mac 2020 has been blocking my wifi connection from time to time. After I reconnect the wifi on my Mac, it will soon been disconnected again, and need me to manually reconnect again. Is caused by KIS firewall? How to fix it? Thanks.