MacOS 32-bit support

[Robert Heller]

At Thu, 25 Jan 2018 23:52:00 -0600 Adrien Monteleone <adrien.monteleone at 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 <jralls at 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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