LAST UPDATED: OCT 14, 2022
Why did this happen?
You may get this message on your Mac:
![Trend Micro Antivirus cannot work if system extension permission is not allowed Trend Micro Antivirus cannot work if system extension permission is not allowed](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZoigk9%2B2Txr%2BNKJRz0gzVmLZYaMWbaVPaMHGdNHM7h%2BkTCREMNijwqzGKA8IDU%2B1ECKyH33x0gf082h8aeXHMlFSU84rZ45S7pskm2Urw7WbaVYCsKrO6oxssYobfnhOuMlF1QJt7MF9dvzRGdwiIjW36BckOInUMbOlLZcndv6uICwUpKCreyAm1rMUr4CyrMMPtU1qKRQ%2Bq5B5ZreWQ4O8%3D%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
"Trend Micro Antivirus cannot work if system extension permission is not allowed"
Why did this happen?
You may have closed the instruction page for setting up System Extension.
How do I fix this?
Allow the Trend Micro Extension and Full Disk Access manually depending on what macOS version you have:
Expand All
For macOS 13 Ventura
Allow Trend Micro Extension and Full Disk Access on macOS Ventura
- Restart your Mac.
- Click OK on the pop up.
- Allow Trend Micro Extensions:
- On the Antivirus for Mac Permission Setup window, click the Open Privacy & Security button.
![Open Privacy & Security Open Privacy & Security](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22%2B0DgRR2N5QYYsI6V4xX4a2nru2LPl9ugN34T1O3Bc7X8mRcy%2Ble9NXNGh%2BMhsAbt7DKMcF2sTbBRgsE7XmqUhisFfWwQHcn6UYSYBS53NxsGxyDzXRwxb%2B%2BPjo9JUVpL%2FXG1oND7Pd18tXhKwK4JtTb2i6QmvKvD5jr05ZAlF61QXG3gZKGM097o8twzJu4A5kzAuYcPzCnxJcPJHihoij72lJ8Cflobk809soTuhvH1nHnoQ4rb%2F7SnczraV%2BfE%22%2C%22iv%22%3A%220e7fbe81eb9857879614500e44b1392b%22%7D)
- The Privacy & Security window should open. Scroll down to Security, then click Details....
![Privacy & Security Privacy & Security](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22CjK%2Bb6ybq8LxbHrhokzcBokCCi7afNoQD5n81VA3w4qTpbeY2fwUCzNjvdClPig9tGHRlKp4C1R6dWCMcrXrtrXu85JoNM1PNfrgJHortQAhWYc7icgSwKksqatleu72H%2Fa94A1mIv2WeWB0B4AiZyW6slxPi1JpslAmvj85SnJ6e9y9TONGbahCbZYFacuzYO41o%2Fe3HuW4r68XXaIkpqGSuscVHYbNmvfTGH8JPgcsR%2FYp9aJXeKO6R4Q7xUOj%22%2C%22iv%22%3A%22889e3a849fb2ad7c43203dedcd062555%22%7D)
- Enter your Mac username and password, and then click Unlock to allow changes.
- Enable all Trend Micro Antivirus Extension items, then click OK.
![Trend Micro Antivirus Extension Trend Micro Antivirus Extension](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22CjK%2Bb6ybq8LxbHrhokzcBokCCi7afNoQD5n81VA3w4oR%2BVd1Jq64TESmz6coSKd6gUYyOUYxK3pv0or5O%2BLNFK1l6lGSTBe61VrTIkV1yMBEdOLhJFtnPxH94EX8EntiJk%2Bp0Yf3gibdv1x%2FaOiwyRiD6LTtJolY%2B6MOiHaYh1PavcesSssQK46CzgrYWtyA2gUguVVD%2BCoKuWDOdh%2Br%2Bjk0DDmxzCkX5TFNcIIPXnLBXaBhYe9yAKy6B1YQpdt5%22%2C%22iv%22%3A%22889e3a849fb2ad7c43203dedcd062555%22%7D)
- Click Allow when you see this pop up below.
![Allow Trend Micro iCoreService on Mac Allow Trend Micro iCoreService on Mac](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22CjK%2Bb6ybq8LxbHrhokzcBokCCi7afNoQD5n81VA3w4pjR8AEllLbVl9UMiFQOobvOQDLKvYoqiSjCWm%2FBjGvRJF0ebFA9SMzLnr9NRFFaaAnJKgv9kKNdygaaZ9jGEpeu%2FEwR3Swu3LU6lq8lnRsHHMFOqNtNMnVoSeYuqvKFBUY9AmShXSanZzeF1XC3LQxDcsvZwCg%2BV5xcuYjMOq6QjOddzQj1fynCWmSssaSEnn5M4ltJlJbMiafBydI7VSq%22%2C%22iv%22%3A%22889e3a849fb2ad7c43203dedcd062555%22%7D)
- Click the Verify button once finished.
![Verify System Extension Verify System Extension](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22TzHSRWZYoDLHHUuow1MdAb9zUnj%2FQgu7DxDLK1elJsXaCWrjRMCnpJ6jhZhjHfoNOIMuBMLUVssQzdDcSXmXO4jLieWdgTWVS14ige988Us9hC3yGjtEsjk71rxKZX6ihnjchNWR90AORO0A4UVDZCy0v%2BGtyroYIjI8GWMMEfcE9REc1%2BUYBkFDH9kUPWLTSZ2zMRtBzoK3UW5C3iyfmAzHDrotJ0uDO46ooDgkghQEASDjm5BQSlaN7%2Bdj161%2B%22%2C%22iv%22%3A%228f91d72c5db3a5b0d7168b2677cee38f%22%7D)
- Allow Full Disk Access:
- On the Antivirus for Mac Permission Setup window, click the Open Full Disk Access button.
![Open Full Disk Access Open Full Disk Access](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22SrcNcC1FnkC9llNerMuhXsz3aHOUY8yPDsFSx2P9nSsMEy8NhytRa1RmANquf0bdt%2Fc5hheqBta%2FYXXsY9Zn26BpToAoigMwrp5qT8VV4TIdvziLz0zfLjMk6zT2SevdWfQhw%2FPIcJCXDZ9BmxQ%2BXtUuIIb7yY1q8gb77%2FlFA5URxqYdg3km4ONyBDhA796Qam5yKZVOdf%2BgDaNndrbMYAqdpPECtadue4mGdd1SRPTHPHH%2FVhe1PEE5Yu%2BHmQAm%22%2C%22iv%22%3A%22a97629d0bdf2166bdcc3b6eba0c2c08d%22%7D)
- Enable Trend Micro Antivirus and Trend Micro Antivirus Extension.
![Enable Trend Micro Antivirus and Trend Micro Antivirus Extension Enable Trend Micro Antivirus and Trend Micro Antivirus Extension](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22kIF2ZxcwehF%2F8F0MFbRYuw%2FuI7hp2kjMruRQeGHuRjHr2xcAQ8NBcMX4cqmtW%2BSmkG%2Fam8SCpPyYbdn6Gmu4U99djzRb11tLJ3DxmSVl8g3jdqXNUyIGmUq6%2FAveqrEx0OIbmWmr%2FwEgjm2qRnxT%2Bw74hMXWFlxSRow%2FpU9xw7fyiTuUwfEijFD%2Bxi4vEs3PaswCjYEyphiA6N3k%2Fwpum3IlHVa53oCF3NrOXNJ05iJ5zT1FWtn8fghFBtZqenwS%22%2C%22iv%22%3A%22f4812a0f9c1f2b610d55c39b4ef0cbae%22%7D)
Can’t find Trend Micro Antivirus and Trend Micro Antivirus Extension?
- Click the Don’t see these items? link.
![Don’t see these items? Don’t see these items?](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22PWUYvyPd4Rh1ILT%2FpgGGDkfYsrNTgpq3RYhxMPjsT0sf20MciAIJ9J1Ys6UPxZ5zROs0Ak67wRMS31AuofMdATF%2FCVFC1kWpI4HUGQyjIQC8kmKBlORUhhhmT8DL9kt3bx4Nd29tEiE2kVh4CcdsgNDZEHWkQUTury7TfIL4RXZ3gX5WD8Qzo5NC1rfEfodVh%2FTLT%2BuOFukCNwB%2BKt4Hv43C2g%2FPN%2F3CDUEmGLPGZ%2FLaHY2PilCjw%2B%2FxBuWmszvW%22%2C%22iv%22%3A%22fe83f06d272debf2d982d3c5a03d0138%22%7D)
- Click the Open File Location 1 button.
![Open File Location 1 Open File Location 1](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22d%2BNMT%2Ff8yULWjFvbdLriE0%2FQBFp3I9DTCPRgia%2B5ajmhNvq8nBSSzXSkld4Tb7XQsGI8Jm%2FjSXTQEigVpJYJLfE5Wyph3lVIkhROEpI33Puy64ceNWyP6YzHjyJvj0b7ye6Y21uvMobsnqD7%2BTN7YuW%2FVwDbsrpkr8vBIp7%2FCjzpNY5Z89YfBuTexJT9yM%2BmYAiF05aa%2BBEsaKstqEU1qukOPXasreB9i03%2BRrEwS2%2Fbg7DWvRzBDGcCgScooiPfIF%2BoQZ%2BfcumIhWptIId6tbehZ8Q2Hfen2Na%2Bg%2BfVVps%3D%22%2C%22iv%22%3A%22b22325f7f6d8b7b158ab101d38e207fe%22%7D)
Drag the highlighted Trend Micro Antivirus entry to the Full Disk Access window.
![Drag the highlighted Trend Micro Antivirus entry to the Full Disk Access window Drag the highlighted Trend Micro Antivirus entry to the Full Disk Access window](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22wokwpGZJrxMdbLSodLXZQ3pgMh7aE4LgFrKF1gy8LwrY7T4ePZlxGXTQVj17JUvv9nkUVkYo5gybI8taMnpx1JBWN9DYqpYRr2w%2BM7v5c7xsUuXV7M%2FSzd9ve3zQER7%2BPiw0jXhr%2B6JGGH9ejistu29jLk4yHhE%2Fo3V3%2B7u1SdqqlXTEFZv2%2BEJSdkAgVr3SLqqm5zdtC%2Br7y6An1s3eaaleHvRKlVe8au0Gxr2pmKdx5jjc6Jo%2FR2KBiLPQ5I0N%22%2C%22iv%22%3A%22c0ad33105b180c4afcb972e9d5722a3a%22%7D)
- Click the Open File Location 2 button.
![Open File Location 2 Open File Location 2](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22d%2BNMT%2Ff8yULWjFvbdLriE0%2FQBFp3I9DTCPRgia%2B5ajmhNvq8nBSSzXSkld4Tb7XQsGI8Jm%2FjSXTQEigVpJYJLdG8DlqrEsZcX2KucUq3T2v0oePoKHMYibov%2FwZkVBv2ktc1TiQBYhp1aS%2FWhB%2F7LhQYiEq1xU%2FXfcznsXHo1QOEQJaDc3wNngR0CclVKI%2BWjYDTUCZLlJ5cZtpDCtOF6SVNx8UOwpVD1Hpz5V99xKl2LKsOUnn64rYeujKdJon0K1yCINiTfIzGJIExqRet1d8Q29ZjcnSjdRFGVMrv7o8%3D%22%2C%22iv%22%3A%22b22325f7f6d8b7b158ab101d38e207fe%22%7D)
Drag the highlighted com.trendmicro.icore.es.systemextension entry to the Full Disk Access window.
![Drag the highlighted com.trendmicro.icore.es.systemextension entry to the Full Disk Access window Drag the highlighted com.trendmicro.icore.es.systemextension entry to the Full Disk Access window](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22wokwpGZJrxMdbLSodLXZQ3pgMh7aE4LgFrKF1gy8LwrOqfGaqqsm90Mmgza3pmh7ssGQr9yKDhrL9oit6O6wZxszbQsHpNA0kGRbCdFTKSpFxny%2F0h6zDino8oEIlaBVJtpl0gHdsm2eP%2FxrTUN2rtHVAdM4CQeEGnHBiKe6tjAs5NVQYnrSLNjk020%2Fo16E1eZRDX%2Bk6SNxD8IcfyFEjQRO2bUn7g8yzb0Dl0umcNM6VoFbgDwusqvmmkCvWsf7%22%2C%22iv%22%3A%22c0ad33105b180c4afcb972e9d5722a3a%22%7D)
- Enter your Mac username and password, and then click Unlock to allow changes.
- Click the Verify button once finished.
![Verify Full Disk Access Verify Full Disk Access](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7B%22Query%22%3A%22SrcNcC1FnkC9llNerMuhXsz3aHOUY8yPDsFSx2P9nSsMEy8NhytRa1RmANquf0bdt%2Fc5hheqBta%2FYXXsY9Zn26lkQGkITIHl4tLDyWJwD4guxOuYeXwnrt3LFP6F8njIzopRCRxbeKt%2By%2BI22N7Fjh%2B0pRpFW6XqWYncNSQZb8h2XYUTo%2B3PiwH8t%2FeiEPzveYwAotUdKCq7uhsfXUjIh%2Bm2RG1Q83tlMAkowW1PAy9XTOWBd6ZYbVw%2BX%2FD5tokL%22%2C%22iv%22%3A%22a97629d0bdf2166bdcc3b6eba0c2c08d%22%7D)
For macOS 12 Monterey and below
Allow Trend Micro Extension and Full Disk Access on macOS Monterey and below
- Click Cancel or Try Again and continue to allow System Guidance.
- Click Continue in the Permission Overview page.
- Click Open System Preferences.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZonliONiOZLYimpuQTVNJFP0xEy3x4mSm7LSQm8rIHDF/CXWO14NREJyQLAalCoWdCBeYudVP5FCQ%2BGNI6EabeleAIRnTsDl9E7zEQW3wdIMFZSdvIyNed2K%2Bt5lrISmbN677EfVDRoAg/lIK4RtBnK5t4rx8UiDPXxBT8fqi2jmP%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
- Unlock the page.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZovRFLYWklMya03Z%2B%2BMF8S6ZnJrBr4tzhZORvTDMTP/tX5AaQpy7w33OJcsdvVvc%2BblRFI8pR7ZQ8irXd0LjdYzgl1NC1g5VV3dGzJqE75xT0mKxkhhezYmEE1uUqOF7ZWD1cIum5WSTSMNHAieRS0aSu3LkO04U9VhoZXXBqXW6l%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
- Click the Allow button.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZoh8olGN4N1NawEzg8dpTomhjrdx9Qis5cb5aQvLI8bDI4IWBdl8U6poe%2BqYcYT3AqpKwGlW69Vu9yqffh95n7rUQkdjXlEqIpUpfS0UG3lNwavcImVxXlBfLLhazoNf580N2L/u1UJxA8ghVRupMffNsZXmWeqPUrQl/%2BXmL/gDJ%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
- Select all Placeholder Developer, and then click OK.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZovEME2OnWp%2B0MXu0q7fLOy9pbtOxvVW%2BeP2iO/4uGd5Y6gT3A1hcH6VW4mG8%2BQpLoMU9C5vAo%2BZPTDUKPmezqawgIWRoT%2BebT8I1pz1uMQpg/99wqv%2BlTGcH/bpJVJ0WSLmVKLogX1X03gqkMiFbgQ6JDA5Wfst/NYNNfr7QMqo/%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
- Click Allow when you see this popup below.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZohqU7UAMFPcKxx4qkGxG2glr8V5KUdH0oSNdRUzv%2BHuOkLrE/VzLeB26ErvcsBbjYJpjBc3AYKzAkxT0ddxbuMHTQqp6BLkKTRynMfdVlSefRqNZGj6f3R/geqptVkHmLjduRN0h%2B1MRwqTLu4GZyiwSh4UmX/RARBiAmxcXDOFs%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
- You will find that the page has changed, click the Continue button.
- Click the Open System Preferences button.
- Unlock the page if it is locked.
- Select Full Disk Access, and then tick Trend Micro Antivirus and Trend Micro Antivirus Extension.
Make sure to select both Trend Micro Antivirus and Trend Micro Antivirus Extension.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZohmQAg3bvqKjv0HCFnjYcrVryMDjDEzaUoavCwL6ngG3eIbw%2B9iVP84l9FG0alW/OcKlPOaggKohSLOf0TOeXEywjhtw5gSyQFwgUPmUJgpOAuaYBAUr5IRb0Dm6JPZ0JQsQy%2BplHvcScj6iH2VfdHQInphPDinzxYqbXKfFnL45%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
- Click Verify to validate the necessary permissions.
![System Extension Blocked System Extension Blocked](https://powerbox-na-file.trend.org/SFDC/DownloadFile_iv.php?jsonInfo=%7b%22Query%22:%22bmp7NvEXEaVhdAIH3ecNrxwBIYksZVxPDncYkhcVxax8WdFAmNFVSaKL8gng6TXXIbQEHolGOFvu9Hs6vhbZovRyitabxV2m%2Bf42YG4pGNumK6J1pLNcD%2Ba8BZ4alMwyrPbFfmpZv9uG2YPYyOO1nHvzRl7CbFHkvaNucI7rStMOd2eCr%2BHNia1SoAiC5R8CVK1uToUl0qBjUrBlDAs1%2BsH5Kds0%2BMTL91RZF%2Bw3JChxMnUKLjUHrO3ir4vUUdTs%22%2c%22iv%22:%22411f7c92d43a3b101653bab66e536e32%22%7d)
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