How to resolve '(null) folder and permissions' error when downloading FileZilla on MacBook Air?

I can download FileZilla on my IMac desktop fine, (2024 M4 chip), but my MacBook Air (2021, M1 chip) refuses to download the file for installation. Both up to date with Sequoia OS. Error message mentioned (null) folder and permissions, but I’m lost! Something in settings is obviously wrong. I even turned off firewall temporarily.

any advice greatly appreciated.



[Re-Titled by Moderator]



MacBook Air 13″, macOS 15.4

Posted on May 14, 2025 11:00 AM

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May 15, 2025 1:54 AM in response to Reader94

Reader94 wrote:

I can download FileZilla on my IMac desktop fine, (2024 M4 chip), but my MacBook Air (2021, M1 chip) refuses to download the file for installation. Both up to date with Sequoia OS. Error message mentioned (null) folder and permissions, but I’m lost! Something in settings is obviously wrong. I even turned off firewall temporarily.
any advice greatly appreciated.


[Re-Titled by Moderator]

There are 4 Categories of Third Party Software / Services that are baffling.


Why some users insist on installing and using the below software. 


In no special order 


Third Party 2 Way Firewalls 


like Lulu and Little Snitch 


Commercial VPNs 


They may not be what one believes they are doing for the computer and what they actually are doing behind the scenes They may also reduce you Internet Speeds by upwards of 30% 


https://gist.github.com/joepie91/5a9909939e6ce7d09e29


VPN: What you need to know - Apple Community


Third Party Security Software 


There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 


The Operating System resides in a Sealed and Read Only Volume that cannot be opened by the User nor by Third Party Applications.


The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.


Security. Built right in


Mac app security enhancements


The Built in Security  is all that is required to protect the computer.


Protecting against malware in macOS


Third Party Disk Cleaners / Optimizer 


Any Third Party Applications that will interfere with the normal operation of the OS,  is an invitation for disaster. 


Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a percentage on each sale. 


What the Application may do to the computer is up to the User to check this out before purchase


To put the Third Party Disk Cleaner / Optimizer in context and the damages it may have or has already done.


This type of applications can or will Muck Up your User Account ( Home Folder ) of this machine.


It does not touch the Operating System itself unless you consider your User Account ( Home Folder ) as part of the Operating System.


The Operating System is hosed

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How to resolve '(null) folder and permissions' error when downloading FileZilla on MacBook Air?

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