Will APFS cause dual boot problems?

Zero real issues with dual-boot with Bootcamp. Small hiccup that I don't myself count as a real issue: You can't use the Bootcamp icon in Windows to boot back directly into macOS, yet. No big deal. Other than that, works perfectly!

(macOS High Sierra 10.13 (17A365) APFS dual-boot with Bootcamp)

you're doing the smart thing - with multiple backups.

i have 2 independent backups, one done using clonezilla and the other done using HDM, so in case i upgrade and have an issue I can also revert.

would be very helpful to know whether or not the upgrade makes changes to the GPT and hybrid MBR. since i myself do not have a lot going on on the windows side, if something goes wrong i could reinstall everything with the target being a clean GPT install of windows 10, essentially getting rid of the hybrid MBR.

don't even know if a hybrid MBR will be supported by an APFS boot volume ?

Yup! This is what it looks like, now (Note that "Yosemite" volume is what would be "Macintosh HD" on most systems):

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 350.1 GB disk0s2

3: Microsoft Basic Data BOOTCAMP 150.0 GB disk0s3

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +350.1 GB disk1

Physical Store disk0s2

1: APFS Volume Yosemite 147.3 GB disk1s1

2: APFS Volume Preboot 22.1 MB disk1s2

3: APFS Volume Recovery 517.4 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

seems to work so far for me, except that which was noted with rebooting into macOS from windows (cannot be done with the windows-based boot camp utility).

i believe that gdisk is not able to recognize APFS volumes - so for me I cannot yet examine the GPT or Hybrid MBR which I assume were left untouched during the upgrade to high sierra.

You won't until High Sierra is actually released. And then, it remains to be seen when Apple will provide Win 10 driver support for the inherent High Sierra version of Boot Camp.

Once High Sierra is officially released and APFS along wth it, I would expect that it would remain possible to have a Mac setup for Boot Camp with an AFPS Mac boot volume and an NTFS Windows volume.

At this time Windows via the Boot Camp drivers is able to read HFS+ volumes but not AFPS volumes. There are third-party drivers which allow Windows in Boot Camp to read/write HFS+ volumes but no such drivers yet for AFPS.

You raise an interesting point about whether it will be possible in the Windows Boot Camp Control Panel to select an AFPS volume as the boot volume. Even if it is not this does not make it impossible to get back in to the Mac volume. There are two boot-time keyboard shortcuts which can help here.

1. You can hold down the Option aka Alt key on the Mac keyboard at boot time and this will normally then display a list of all bootable volumes both Mac and Windows. (You need a video card that has Mac firmware so if your using a classic Mac Pro with a non-flashed video card this method is not possible.)
2. You can hold down the X key and this will boot from a Mac volume instead of a Windows volume, this I believe should work even if you do not have a Mac flashed video card.

See Startup key combinations for Mac - Apple Support

Your previous technique of using an exFAT volume for data transfer would still work.

i believe that high sierra is going to be official tomorrow .....

for those that already have a dual-boot setup and they upgrade to APFS, please post your experiences.

to date, I have not seen an update to the boot camp drivers via apple's software update when logged into windows 10.

I'll let you know. I don't have anything mission-critical on my Bootcamp partition, so I'll be trying it out tomorrow. I can afford to have to wipe the entire SSD and start over if I have to, having 3 different backup types of Windows, and 4 different backup types of macOS. Plus multiple backups of the GPT and MBR data (which I won't need).

Worst case, I'll have to go back to macOS 10.12.6. I'll let you know.

Hehe. "I" don't. I assumed you knew what it looked like before in Sierra, with just the four volumes on one disk, so I posted what it looks like now under High Sierra with APFS. APFS always works out of a container, so each "disk" in the container is a virtual disk. I didn't decide this. I'm assuming that Apple made it this way so that they could use the "combined free-space" feature, but that's just a guess. Either way, this is what it looks like now. Wasn't my choice. 🙂

ill check gdisk tonight to see if it modified the volumes, but i suspect it did not.

on my side - i had to reconnect to my wifi broadcast because it somehow lost it during the upgrade.

after a few reboots and sucessfully reatarting with windows 10, seems ok so far. i am somewhat confused because storage-wise I was expecting a gain of some GB’s on the macOS side, but did not gain anything.

problem with High Sierra: i've got 2 smb NAS shares which auto-mount at login. they seems to randomly drop out from finder.

not good, i have some batch jobs which i run to copy data to folders on the NAS, that is being affected.

here is what my volumes/partitions look like.

this is a different layout from what I'm used to seeing ....

MBP:~ adminuser$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 70.7 GB disk0s2

3: Microsoft Basic Data Windows 172.1 GB disk0s3

4: Microsoft Basic Data SHARE 8.0 GB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +70.7 GB disk1

Physical Store disk0s2

1: APFS Volume macOS 50.4 GB disk1s1

2: APFS Volume Preboot 20.5 MB disk1s2

3: APFS Volume Recovery 520.0 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

I have been running macOS high Sierra and windows in boot camp you can select windows from Mac but to bootblack you have to restart wait for chime then hold down option key then select Mac as boot partition

the lack of an update to the boot camp drivers for windows - indicates to me that Apple wants to abandon support for windows installations on their computers in general.

that's a potential abandonment to their customer base.

i suppose then that when the public beta is available, i can find that out ....

Not unless Apple has publicly announced a feature. Anyone running a beta cannot divulge anything to do with the software as they are limited by the non-disclosure agreement they agreed to as it is considered confidential. We are also not allowed to speculate.

So, you can sign up and run the beta, but you will not be able to ask any questions about it or discuss any features here. Here is some info on it:

https://appleseed.apple.com/sp/betaprogram/faq