Xdebug when loading Apache gives an error on Mac OS - what's the problem?

Question

xdebug

I installed php 7.4 (on versions before it, I used xdebug that came with the system), now I installed it via PECL, and when I start Apache, I get this error:

Failed loading /usr/local/lib/php/pecl/20190902/xdebug.so: dlopen(/usr/local/lib/php/pecl/20190902/xdebug.so, 9): no suitable image found. Did find:
/usr/local/lib/php/pecl/20190902/xdebug.so: code signature in (/usr/local/lib/php/pecl/20190902/xdebug.so) not valid for use in process using Library Validation : mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.

I climbed the whole stackoverflow - I did not find the answer. Maybe someone here knows how to overcome the error?
in php.ini is the following:

[xdebug]
zend_extension = "/usr/local/lib/php/pecl/20190902/xdebug.so"

This file 100% exists, even though it says no suitable image found