At Fri, 26 Jan 2018 13:08:06 -0600 Adrien Monteleone <adrien.montele...@gmail.com> wrote:
> > Yes, with a performance hit, it is possible, at least with Virtualbox to > install a 64-bit OS on a 32-bit host. Mileage varies based on the host and > guest. Iâve pulled it off a few times. I donât know however if you can > run apps that require 64-bit in such a guest without issue. I guess to run 64-bit guests on 32-bit hosts, the virtualization software is actually *emulating* a 64-bit processor (I guess Virtualbox does that). I think Linux/KVM does not do that. Actually, I belive 32-bit RHEL/CentOS 6 does not include KVM and has no virtualization support. All x86_64 processors can run in i686 mode and can run 32-bit applications, but you need the 32-bit shared libraries. My guess in the case of the newest MacOSX, Apple is not bothering to ship the 32-bit libraries or is not shipping "universal" (32-bit/64-bit) libraries, however they handle that. Typlically with *Linux* almost every shared library is available as a 64-bit and a 32-bit library (RHEL/CentOS uses /usr/lib for 32-bit and /usr/lib64 for 64-bit, Debian does something different, I think there are /usr/lib/i386-linux-gnu/ and /usr/lib/x86_64-linux-gnu/ directories. > > As for the other way around, Iâve never had an issue, but then I also > didnât have the situation of the host not supporting 32-bit apps either. > Itâs worth a shot I suppose to see if older but still functional hardware > can be extended on life support a bit longer. > > > Regards, > Adrien > > > On Jan 26, 2018, at 6:46 AM, Robert Heller <hel...@deepsoft.com> wrote: > > > > 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 donât > >> 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 wouldnât 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 > >>> (theyâll announce the name at WWDC in June) wonât support 32-bit > >>> applications. > >>> > >>> GnuCash.app 2.7.x is 64-bit and wonât have a problem. That also means > >>> that it wonât work for the (one hopes very few) users who still have > >>> 32-bit Macs. It actually wonât 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 > >>> > >>> _______________________________________________ > >>> gnucash-user mailing list > >>> gnucash-user@gnucash.org > >>> https://lists.gnucash.org/mailman/listinfo/gnucash-user > >>> ----- > >>> Please remember to CC this list on all your replies. > >>> You can do this by using Reply-To-List or Reply-All. > >> > >> _______________________________________________ > >> gnucash-user mailing list > >> gnucash-user@gnucash.org > >> https://lists.gnucash.org/mailman/listinfo/gnucash-user > >> ----- > >> Please remember to CC this list on all your replies. > >> You can do this by using Reply-To-List or Reply-All. > >> > >> > > > > -- > > Robert Heller -- 978-544-6933 > > Deepwoods Software -- Custom Software Services > > http://www.deepsoft.com/ -- Linux Administration Services > > hel...@deepsoft.com -- Webhosting Services > > _______________________________________________ > gnucash-user mailing list > gnucash-user@gnucash.org > https://lists.gnucash.org/mailman/listinfo/gnucash-user > ----- > Please remember to CC this list on all your replies. > You can do this by using Reply-To-List or Reply-All. > > > -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services hel...@deepsoft.com -- Webhosting Services
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