https://www.paragon-software.com/home/extfs-mac/
It also doesn't seem surprising to me that Apple itself wouldn't support ext2/3/4. It's something very few Mac users are going to care about. Why would Apple dedicate any resources to it?
FWIW, I've been using Linux and Macs for over two decades and I can only recall maybe a single time I even wanted to mount an ext formatted drive onto a Mac, and vice-versa (HFS onto Linux). For exchanging files via floppy disks or thumb drives, various flavors of FAT have been near universal for ages. CDs/DVDs/BluRay use their own filesystem. And FTP/NFS/SMB/AFP/HTTP/SCP/RCP have been around forever for exchanging over a network. (Before ssh/scp, there was unencrypted rlogin/rsh/rcp... I'm dating myself.)
- FAT32 can't go above 4GB files, can't do sparse files and can't store UNIX permissions at all
- NTFS can do large and sparse files, but can't deal with UNIX permissions, instead bringing NT ACLs (which no one else understands). exFAT used to be patent encumbered and has the same limitations that NTFS has, plus its support is nowhere near as battle-tested as NTFS is
- HFS/APFS are not supported at all under Windows and support in Linux is spotty at best
- ext4 has third-party read (and if you're risk-tolerant, write) support on Windows and Linux, but it's hacky or expensive
The situation, as it is, is an utter shame.
Really it would be nice if everyone could just natively read EXT3/4 out of the box - theres no reason NOT to add it. And even though Microsofts new file system still doesn't seem to have taken off (ReFS) it is quite good.
Files up to 16 EiB, supported from Windows XP and up, Mac's with OSX and up, Linux had some bugs back in 2010 which prevented you from dealing with very large devices that were over 80% full.
Been doing it for over 10 years now, and it is still one of the best formats for universal access.
FWIW, the company I linked elsewhere provides full ext4 support products for both macOS and Windows.
Shoving data across operating systems using USB sticks or drives is a pretty standard thing to do, at least in the corporate world which is filled with slow internet connections (in related words, never underestimate the bandwidth of a truck filled with SD cards), and particularly when having to send data to clients or vendors.
The fact that there is no standard that works on all three major OS families and in the best case also supports encryption is maddening - macOS has Filevault, Windows has Bitlocker and Linux has LUKS, and neither of the three can understand any other.
Just ask an IT helpdesk in any major company how many questions they get a day by people who have to transfer files to a vendor or client, with encryption. Extra fun in anything involving creative work because most of that happens on Macs whereas most big-corp customers use Windows because of Active Directory and GPO. (And no, ZIP isn't an answer because Apple's built-in unarchiver routinely gobbles up when encountering password protected ZIPs)
> I don't even understand the use case for file permissions on an external drive.
Unlike Windows which conveys the fact that an executable is an executable by the file suffix .exe (or .cmd/.bat, and I think *.js was at least until Windows 7 associated with the JScript interpreter), Linux and macOS do so by using the execute permission on the file.
The use case would be to copy a Java application, let's use jadx, downloaded and extracted on a Mac, then copy it via an USB stick or a Windows CIFS file share on another Mac or a Linux machine, and have the command bin/jadx-gui still start up the UI when clicked upon. As soon as any non-Unix filesystem is in the copy path, it gets inevitably nasty.
File permissions usually don't make sense on an external drive that's moving between computers, much less computers running a different OS.
I just don't see why it's surprising that Microsoft and Apple don't have built-in support for ext when FAT/exFAT support is good enough for 99% of interop use cases.
exFAT is better, but it is also quite recent development on Linux, since it was licensed and only in 2019 that Microsoft publicly said, they would not ask for any licensing and the specification became publicly available.
Both of them are quite unfriendly to flash memory, but exFAT is good enough.
There's a version of 7zip for windows, linux and Mac. It's supposedly safe for now. Until the next vulnerability is found I guess but that is the same for every option.
Bit of a downside that it is a third party option that would then have to be installed everywhere you want it rather than a native option though.
Latency is the issue! Once I was working at a museum and we needed to get these stupidly high detail 3D scans to the university. Considering the IT policy and available bandwidth it was quicker for us to put all the files on a single HDD and walk it over.
Mostly it doesn't. And in any case, Windows doesn't ship with native support for mounting ext either. Only recently by installing WSL can it do so. So a very tiny minority of Windows users care about it.
https://devblogs.microsoft.com/commandline/access-linux-file...
Full ext2/3/4 read-write support. $39.95.
There's also fuse-ext2 via macFUSE but its doc still say: "Even though write support is available, please do not mount your filesystems with write support unless you have nothing to lose."
Very hard.
Instead there are 3rd party implementations. Those are independently maintained, serving directly the (comparatively small) target audience.