At Thu, 25 Jan 2018 23:52:00 -0600 Adrien Monteleone 
<adrien.montele...@gmail.com> wrote:
> 
> Thanks for the heads-up. (I still have a Snow Leopard Macbook, but don’t
> use it for GnuCash any longer)
> 
> Any reason to think a 32-bit vm to run 2.6.x if needed on 10.14 or a 64-bit
> vm to run 2.7/3.0 on older Macs wouldn’t handle those hopefully few cases?
> (other than maybe a performance hit that is)

Is it possible to run a 64-bit VM on 32-bit hardware?  I suspect not.

Note: with Linux/KVM (don't know about other VM systems), you don't actually 
get a "32-bit" VM -- all VMs are 64-bit, just like the host -- you just 
install a 32-bit O/S on the 64-bit machine.  A 32-bit OS installed on a 64-bit 
machine (VM or bare metal) behaves like it was installed on a i686 w/PAE.  At 
least that is the case of Linux.  I have no clue what MacOSX will do if you 
try to install a 32-bit incarnation on 64-bit hardware (unless it is a really 
old version of MacOSX).  I guess you could always install a 32-bit version of 
Linux (not really sure why -- even though RH dropped 32-bit *kernels* from 
CentOS 7, 32-bit applications can still be run on CentOS 7 -- I would guess 
the same would be true of Ubuntu if/when they stops being 32-bit kernels for 
Ubuntu). 

> 
> Regards,
> Adrien
> 
> > On Jan 25, 2018, at 11:11 PM, John Ralls <jra...@ceridwen.us> wrote:
> > 
> > On the off chance that anyone else is running a Mac with Developer Beta 
> > MacOS installed, the latest developer beta will put up the attached dialog 
> > when you launch Gnucash 2.6.x. What it means is that MacOS 10.14 (they’ll 
> > announce the name at WWDC in June) won’t support 32-bit applications.
> > 
> > GnuCash.app 2.7.x is 64-bit and won’t have a problem. That also means 
> > that it won’t work for the (one hopes very few) users who still have 
> > 32-bit Macs. It actually won’t support anything older than MacOS X 10.9 
> > (Mavericks) which will shut out a few of the early 64-bit Macs as well.
> > 
> > Regards,
> > John Ralls
> > 
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