Mojave; File System & Update Questions

Apple_Glen_UK

macrumors 6502
Original poster
Oct 26, 2015
260
758
West Sussex, England
I’m mulling over whether to upgrade from Sierra to Mojave and have read the various opinions of people on here. There are a couple of things which I’m uncertain on – any advice/clarification would be most welcome:

1 - As I’m currently on Sierra (not High Sierra), I assume my file system is HFS+. I know nothing about this system or the APFS one, although if I upgrade to Mojave it will be APFS I understand. I’m unsure of the difference and – if I do upgrade – will I notice any changes to the documents currently stored on my Mac?

2 - I appreciate that the Mojave GM version has only just come out, but does anyone have any idea on when the .1 update is likely to be? I’ve only had a Mac for a few years and am unsure when this could be.

Thanks and apologies if these matters have been covered elsewhere on here.
 

oatman13

macrumors regular
Feb 14, 2013
228
60
I’m mulling over whether to upgrade from Sierra to Mojave and have read the various opinions of people on here. There are a couple of things which I’m uncertain on – any advice/clarification would be most welcome:

1 - As I’m currently on Sierra (not High Sierra), I assume my file system is HFS+. I know nothing about this system or the APFS one, although if I upgrade to Mojave it will be APFS I understand. I’m unsure of the difference and – if I do upgrade – will I notice any changes to the documents currently stored on my Mac?

2 - I appreciate that the Mojave GM version has only just come out, but does anyone have any idea on when the .1 update is likely to be? I’ve only had a Mac for a few years and am unsure when this could be.

Thanks and apologies if these matters have been covered elsewhere on here.
If you are currently on Sierra (10.12.x) then yes you are definitely running HFS+. APFS brings basic improvements to atomic write operations; which means if your machine shuts down during a writing operation, your filesystem won't become corrupted. APFS also supports space sharing, which is the notion that you can have multiple volumes under one partition. Since the volumes space-share you can create a 10000 of them and they won't take up any space. High Sierra had issues with Fusion and HDD performance, however in Mojave those issues have been addressed.

I'd strongly encourage you to update to Mojave; this OS has been one of Apple's better OSs thus far. Although you may be waiting for 10.14.1; I believe you'll have no issues upgrading to 10.14 GM.

And if you hit a problem (unlikely), the friendly folks on this forum will be glad to help! :)
 
  • Like
Reactions: Apple_Glen_UK

CoastalOR

macrumors 68030
Jan 19, 2015
2,693
989
Oregon, USA
2 - I appreciate that the Mojave GM version has only just come out, but does anyone have any idea on when the .1 update is likely to be? I’ve only had a Mac for a few years and am unsure when this could be.
I would expect the 10.14.1 release to be the end of October.

Here is the recent history of Apple .1 releases:
Recent releases:
10-21-2015 OS 10.11.1 released
10-27-2016 OS 10.12.1 released
10-31-2017 OS 10.13.1 released
 
  • Like
Reactions: Apple_Glen_UK

ApfelKuchen

macrumors 68040
Aug 28, 2012
3,570
2,216
Between the coasts
If you're concerned that the file system change will somehow modify your documents; no, you won't see any changes to the content/appearance of your files. The file system underlies the files themselves - how the system handles read/write operations in order to minimize the possibility of data loss, for example. If you imagine your HDD to be a physical filing cabinet, the file system is the rules and business procedures that determine how a file clerk manages the contents of that filing cabinet. The documents that are stored in the filing cabinet are not affected by those rules and procedures.
 

Apple_Glen_UK

macrumors 6502
Original poster
Oct 26, 2015
260
758
West Sussex, England
Thanks for all the info - really appreciate it and it's a big help. My biggest concern was that the new file system would alter things in a big way, and I'm not great with change! I will probably wait until the .1 release and update to Mojave then.
 

mtbdudex

macrumors 68000
Aug 28, 2007
1,816
280
SE Michigan
I've got a Late 2015 5k iMac 4GHz 27"i7, 3TB Fusion hybrid drive, currently on High Sierra, does this fix the fusion drive formatting issue??
 

Howard2k

macrumors 68030
Mar 10, 2016
2,900
2,158
Thanks for all the info - really appreciate it and it's a big help. My biggest concern was that the new file system would alter things in a big way, and I'm not great with change! I will probably wait until the .1 release and update to Mojave then.

I have a 2015 13" and did a clean install of Mojave.
Overall it's been great, but the Sleep functionality was reduced in High Sierra and is incredibly even worse in Mojave.
My Samsung printer/scanner is also not working yet.


It's certainly more stable that High Sierra was for me, but I'm very disappointed in the sleep issues.

It doesn't seem to affect everyone, but there are a few posts about it.
 

Apple_Glen_UK

macrumors 6502
Original poster
Oct 26, 2015
260
758
West Sussex, England
Interesting.

Ok; one more question. If (when) I upgrade to Mojave, will it be possible to roll back to Sierra if I am not happy with it? I know this is not what Apple wants, but is there somewhere - a link or something - where I would be able to downgrade to Sierra again?
 

Howard2k

macrumors 68030
Mar 10, 2016
2,900
2,158
Interesting.

Ok; one more question. If (when) I upgrade to Mojave, will it be possible to roll back to Sierra if I am not happy with it? I know this is not what Apple wants, but is there somewhere - a link or something - where I would be able to downgrade to Sierra again?

Yeah, just restore from a backup.
 

fourthtunz

macrumors 65816
Jul 23, 2002
1,187
653
Maine
I'm on Siera and am looking to upgrade to Mohave..will I have any problems going back and forth with external drives
that are formatted to HFS+ ?
Wondering about old Protools Sessions and such..any problems?
 

ApfelKuchen

macrumors 68040
Aug 28, 2012
3,570
2,216
Between the coasts
I'm on Siera and am looking to upgrade to Mohave..will I have any problems going back and forth with external drives
that are formatted to HFS+ ?
Wondering about old Protools Sessions and such..any problems?
There shouldn't be any issues. Mojave still supports HFS+ drives (among other formats).

Mojave can read and write to APFS, HFS+, FAT32, and ExFAT drives. It can read (but not write) NTFS.
 

fourthtunz

macrumors 65816
Jul 23, 2002
1,187
653
Maine
There shouldn't be any issues. Mojave still supports HFS+ drives (among other formats).

Mojave can read and write to APFS, HFS+, FAT32, and ExFAT drives. It can read (but not write) NTFS.
Thank you! Just thought I would confirm that! Have a great weekend!
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.