one person asked "why would anyone NOT want APFS?" Here's why

[kentval]

1) as of this date, a drive with APFS cannot be repaired. Not Apple; not DiskWarrior; not Drive Genius; not TechTool Pro - well, you get it. All you can do to protect yourself is to make LOTS of clones.
2) If you install APFS (which you get if you install Mojave) on a spinner (traditional HDD; not an SSD) you will make it slower and slower. Every file edit you make to any file creates a new fragment. Pretty soon the heads in your drive are thrashing about like mad. (Yes: it slows down SSDs too, but by their nature, you won't notice it as much.)
3) Photoshop won't run properly. (failing to save files properly; Creative Cloud issues)
4) many printer and scanner drivers won't work
5) Scripting additions are history
... the list goes on and on and on and...

https://macstrategy.com/article.php?203

"Look before you leap."

 

[itwas]

i would prefer HFS+J format, at least linux can easily mount and read the volume data.

 

[TravelerTechie]

1) as of this date, a drive with APFS cannot be repaired. Not Apple; not DiskWarrior; not Drive Genius; not TechTool Pro - well, you get it. All you can do to protect yourself is to make LOTS of clones.
2) If you install APFS (which you get if you install Mojave) on a spinner (traditional HDD; not an SSD) you will make it slower and slower. Every file edit you make to any file creates a new fragment. Pretty soon the heads in your drive are thrashing about like mad. (Yes: it slows down SSDs too, but by their nature, you won't notice it as much.)
3) Photoshop won't run properly. (failing to save files properly; Creative Cloud issues)
4) many printer and scanner drivers won't work
5) Scripting additions are history
... the list goes on and on and on and...

https://macstrategy.com/article.php?203

"Look before you leap."

Although I am not gonna argue, I would just like to report that I have been using APFS since High Sierra, and it’s all good here, and speeds are faster on APFS.

 

[Michelinu]

1) as of this date, a drive with APFS cannot be repaired. Not Apple; not DiskWarrior; not Drive Genius; not TechTool Pro - well, you get it. All you can do to protect yourself is to make LOTS of clones.
2) If you install APFS (which you get if you install Mojave) on a spinner (traditional HDD; not an SSD) you will make it slower and slower. Every file edit you make to any file creates a new fragment. Pretty soon the heads in your drive are thrashing about like mad. (Yes: it slows down SSDs too, but by their nature, you won't notice it as much.)
3) Photoshop won't run properly. (failing to save files properly; Creative Cloud issues)
4) many printer and scanner drivers won't work
5) Scripting additions are history
... the list goes on and on and on and...

https://macstrategy.com/article.php?203

"Look before you leap."

1. Why should we repair our SSD drives if they work?
2. Is someone still using a prehistoric HDD in 2018 to boot? WHY? Are museums full of HDD and either they don't want them?
3. I use APFS since when it was released on real Macs and Hackintosh, no problem at all
4. No problem with all printers I used
5. Scripts have to be history in 2018

 

[TravelerTechie]

1. Why should we repair our SSD drives if they work?
2. Is someone still using a prehistoric HDD in 2018 to boot? WHY? Are museums full of HDD and either they don't want them?
3. I use APFS since when it was released on real Macs and Hackintosh, no problem at all
4. No problem with all printers I used
5. Scripts have to be history in 2018

I honestly don’t see the big deal. APFS offers faster boot up and faster transfer speeds. And I have not witnessed a single issue with it.

Old hardware should stick with old software anyways. I only use HDDs for storage. Never to boot an OS, and as soon as I can afford it (or the prices for large capacity SSDs drop) I will replace my HDDs with SSDs too.

 

[Khaibit]

Never to boot an OS, and as soon as I can afford it (or the prices for large capacity SSDs drop) I will replace my HDDs with SSDs too.

In addition, there are filesystems specifically designed for mass storage across large HDDs, like ZFS. Right tool for the job

The next version of Diskwarrior will have full support for repairing APFS volumes; they did not receive the technical documentation on APFS in time for it to make 5.1. Apple Disk Utility in Mojave will happily run First Aid on APFS containers and volumes within the containers, so I'm not quite sure what the OP means by "...a drive with APFS cannot be repaired. Not Apple;..." either, heh. That said, the next question to anyone that worried about repairing a filesystem is "Why aren't you backing up regularly?".

Finally, OP is misrepresenting several things(or perhaps just did not read the article fully). Some printer and scanner drivers not working, and Scripting Extensions going away, have nothing to do with APFS, those are things related to core OS changes in Mojave itself.

 

[TravelerTechie]

In addition, there are filesystems specifically designed for mass storage across large HDDs, like ZFS. Right tool for the job

The next version of Diskwarrior will have full support for repairing APFS volumes; they did not receive the technical documentation on APFS in time for it to make 5.1. Apple Disk Utility in Mojave will happily run First Aid on APFS containers and volumes within the containers, so I'm not quite sure what the OP means by "...a drive with APFS cannot be repaired. Not Apple;..." either, heh. That said, the next question to anyone that worried about repairing a filesystem is "Why aren't you backing up regularly?".

Finally, OP is misrepresenting several things(or perhaps just did not read the article fully). Some printer and scanner drivers not working, and Scripting Extensions going away, have nothing to do with APFS, those are things related to core OS changes in Mojave itself.

It's like when NTFS was released. Some people just get the scares for no reason. Any problems that do arise, is due to being a new technology and will be ironed out in good time, just like everything else. When APFS came out, I didn't even blink, as soon as I got my build for the Hackintosh, I let the High Sierra format it to APFS. All was (and still is) well.

 

[drevan]

3) Photoshop won't run properly. (failing to save files properly; Creative Cloud issues)

I use CC and Photoshop Daily and yet to experience an issue. Don't know where that statement comes from.

As the rest pointed out. Who uses HDD for a boot drive in 2018? I bought 2 mac mini's a year ago that had HDDs only. What a horrific experience, i have completely forgotten what HHD as boot drive is thought something must be wrong with them. Booting took minute+ (in Sierra) and apps started so slowly.

 

[kentval]

Here's where the OP (me, who BTW, was the first developer hired by Apple, in 1978, and has worked with their products for the past 40 years) got his information:

https://macstrategy.com/article.php?203 (which was posted, and apparently ignored, in the first case)

and

http://docs.macsysadmin.se/2017/video/Day3Session4.mp4

"1. Why should we repair our SSD drives if they work?"
You wouldn't, obviously. It's when something goes wrong that you need to repair. (Really? Did I need to answer this?)

Yes: there is a difference between Mojave and APFS, except that it's a "difference without a difference" : you cannot install Mojave without also getting APFS.

"Doesn't everyone boot from an SSD? " Shocking as this may be: no. (Do I? Yes, and I'm currently running 8 SSD, and a few spinners.)

"Who cares about scripting?" You'd be surprised how much legacy stuff depends on Scripting Additions. Many of us use our computers professionally, with demanding applications.

"but photoshop runs for me"
https://helpx.adobe.com/photoshop/kb/photoshop-and-macosmojave.html

Am I fear mongering? OMG. I'm such an early adopter that I was (in my Apple days) running stuff that the public was a year away from seeing.

To all of the "but it's working fine for me" - sigh. That's what's called "anecdotal evidence." There are going to be many casual users that will experience no problems at all. Good on you.

But when serious testing is done, and issues are acknowledged, then it's not "fear mongering" to simply report them.

I did NOT make a recommendation on whether to go with Mojave/APFS, did I?

What I said was "look before you leap."

 

[Michelinu]

A lot of people replied and no one have a single issue.
You can do 1+1 and get your results.