MRT in activity monitor has high Cpu usage

The same with Catalina 10.15.7 and MRT 1.68. CPU hitting 100% and CrashReport appears frequently in top.

Also. lots of console errors:

ошибка 15:48:21.661355+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/ConfigurationEngine/Database-shm

ошибка 15:48:21.661397+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database

ошибка 15:48:21.661427+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database-wal

ошибка 15:48:21.661508+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database

ошибка 15:48:21.661602+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/dmd/Policies/Database-wal

ошибка 15:48:21.665994+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/com.apple.LaunchServices.dv/com.apple.LaunchServices.trustedsignatures-501.db

ошибка 15:48:21.667130+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/folders/_6/r5pq_2vj393dl69grtddknb00000gn/0/com.apple.lockoutagent

ошибка 15:48:21.684313+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/db/CoreDuet/Knowledge/knowledgeC.db

ошибка 15:48:21.684360+0300 kernel Sandbox: MRT(5909) System Policy: deny(1) file-read-metadata /private/var/db/CoreDuet/Knowledge/knowledgeC.db-wal

ошибка 15:48:37.891865+0300 MRT os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory

ошибка 15:48:37.918745+0300 MRT cannot open file at line 43353 of [378230ae7f]

ошибка 15:48:37.919441+0300 MRT os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory

ошибка 15:48:37.919265+0300 MRT cannot open file at line 43353 of [378230ae7f]

ошибка 15:48:37.921833+0300 MRT os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory

ошибка 15:48:37.932357+0300 MRT cannot open file at line 43353 of [378230ae7f]

I got same issue. MRT just keep up and down and my CPU like crazy.

Since I got no Time Machine backup to downgrade MRT 1.68 to 1.67, I tried rename MRT.app to MRT.app.bak

And it works! My CPU now is calm.

path:

/Library/Apple/System/Library/CoreServices/MRT.app

You may need to disable SIP so you can rename MRT.app.

This is not a final solution. Hope Apple could fix it ASAP.