Upload to esp01 failed

[Peter8200]

I a using Arduino IDE - esp8266 board installed release 2.7.4. on mac BigSur 11.3.1. (latest security fix) and can't upload to my device.
Everytime i got
pyserial or esptool directories not found next to this upload.py tool.
An error occurred while uploading the sketch

The psyserial and esptool are correctly installed. I even use the fix found on the internet for big sur to replace, modify the list_port_osx.py file (#7763)
#iokit = ctypes.cdll.LoadLibrary(ctypes.util.find_library('IOKit'))
#cf = ctypes.cdll.LoadLibrary(ctypes.util.find_library('CoreFoundation'))
iokit = ctypes.cdll.LoadLibrary(’/System/Library/Frameworks/IOKit.framework/IOKit’)
cf = ctypes.cdll.LoadLibrary(’/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation’)

But this folder is not on my device : " /System/Library/Frameworks/IOKit.framework/IOKit".
The folder /System/Library/Frameworks/IOKit.framework/ exist.

Anyone any idea to upload to the esp01.
Does anyone has expericence with the new Arduino ID 02, can a migration to this release help.

Thanks.

Peter.

I am a new in all the arduino stuff...

[Peter8200]

Does anyone has the same issue. I tried everything, rollback to older board version... Everything I found on the internet.