Maybe I can help you Nouri_h_ Khattab..
A Mac does not work or recognize an android phone natively without help e.g. third-party apps. seeing as how you have a Samsung phone, I’d recommend Samsung kies for mac os x.. And seeing as how it’s an android phone not an iPhone.. try this for file transfer( link)
https://www.android.com/filetransfer/
and this to do it wirelessly.. get the app from the google store, etc( link again)
https://airmore.com/help/android/connect-android-to-mac.html
and this especially pertaining to samsung phones and macs: link
https://itstillworks.com/samsung-phones-connect-apple-computers-18135.html
and finally this: ( link)
https://www.macworld.co.uk/how-to/transfer-android-mac-3683573/
john b