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How do I change from 32 bit to 64 bit?

New Here ,
Feb 25, 2019 Feb 25, 2019

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How do I update Acrobat to 64 bit from 32 bit?

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Install update and subscribe to Acrobat

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Adobe Employee , Feb 25, 2019 Feb 25, 2019
You didn't indicate what platform you are on, but all versions of Acrobat (and Reader) for MacOS since 2015 (DC, 2015, and 2017) have been 64-bit (except for part of the installation infrastructure which will be updated soon).For Windows, Acrobat (and Reader) is currently 32-bit. No 64-bit version has yet been announced.          - Dov

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Adobe Employee ,
Feb 25, 2019 Feb 25, 2019

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You didn't indicate what platform you are on, but all versions of Acrobat (and Reader) for MacOS since 2015 (DC, 2015, and 2017) have been 64-bit (except for part of the installation infrastructure which will be updated soon).

For Windows, Acrobat (and Reader) is currently 32-bit. No 64-bit version has yet been announced.

          - Dov

- Dov Isaacs, Principal Scientist, Adobe

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New Here ,
Apr 09, 2020 Apr 09, 2020

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I am having Windows 10 OS and my computer is 64 Bit I want to install adobe photoshop then will i have to install 32 bit application or I can cut and paste the adobe file from program file(x86)[contains 32 bit application folders] to program files[contains 64 bit application folder] folder and install 64 bit adobe photoshop application?

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Adobe Community Professional ,
Apr 09, 2020 Apr 09, 2020

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The topic here is "How do I change from 32 bit to 64 bit?" but it was cetgorized in the Adobe Acrobat support forum under "Install update and subscribe to Acrobat".

 

You should post this question in the Adobe Photoshop forums so that you can get better assisted with your question there.

 

But if it helps, Photoshop will install a 64bit version if it detects that your windows version is 64bit, and 32bit if Windows is 32bit. Even though it is possible to make the switch to 32bit mode, nowadays there should be no reason to switch back to 32bit unless you end-up with any special circumstances as described in this thread: https://www.quora.com/I-have-a-64-bit-operating-system-Windows-10-should-I-use-the-64-bit-Photoshop-...

 

 

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Most Valuable Participant ,
Apr 09, 2020 Apr 09, 2020

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By the way, dragging apps around like this won't fix anything, but could break a whole lot. Apps have to be installed, not dragged around, and you can't drag the 32-bit version to the 64-bit folder to magically convert it. Nor do you have to, 32-bit apps are just fine in 64-bit Windows system. 

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Community Beginner ,
Apr 11, 2019 Apr 11, 2019

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Is there on the part of Adobe a plan for the introduction of a 64bit versionunder Windows10, then?

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Adobe Employee ,
Apr 11, 2019 Apr 11, 2019

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We have not yet announced such a version.

Is there a particular reason why you require or desire a 64-bit version at this time? We'd be interested in any issues that you believe require such 64-bit support.

For the record, 64-bit by itself does not yield any greater functionality or performance than 32-bit and in fact in some cases can yield slightly lower performance!

          - Dov

- Dov Isaacs, Principal Scientist, Adobe

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Community Beginner ,
Apr 12, 2019 Apr 12, 2019

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As an enterprise of rolling stock, we partly produce very big data sets in the development. It is an idea already followed up for a long time to replace the conventional 2-D drawings by a 3D-PDF enriched with necessary information, which then the following processes can be provided - ideally with a freely accessible viewer.

32-bit applications come very fast to their capacity limits.

Investigations from us are showing, that the 32bit-Reader loses the graphical information from a certain size of data (about 200-300MB filesize).

The PDF can be retrieved, but whren we activate the 3D-information (directX) it tooks very long time, and either the 32bit-Reader crashes (not responding),or the graphic area remains black.

Because this effect, however, appears only at bigger files, we suspect the cause at 32 bit - application.

If you have another idea of solution, however, of course we are also very interested in it.

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Most Valuable Participant ,
Apr 12, 2019 Apr 12, 2019

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You may be looking at all sorts of bugs or incompatibilities, and I suggest you focus on them rather than the hope that 64-bit code will make your problems go away. That you feel this may be the case is a tribute to the success of marketing campaigns for software which try to make us feel that 64 bit is worthwhile. As a programer, I can tell you this is almost entirely nonsense, and empty marketing. Almost all the time, 64 bit is worthwhile if and only if the 32 bit software is heading for its 2 GB virtual memory limit.

In your case, when you see failure, do you see the memory rising to 2 GB? If not, 64 bit would do nothing for you. It certainly wouldn't go faster.

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Community Beginner ,
Apr 12, 2019 Apr 12, 2019

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Dear MVP,

Thank you for your comment, but you can bet we are no amateurs. Our decisions depend on marketing campaigns far less often than you may assume.

In the area of MCAD, we are using 64-bit technology since almost 15 years. RAM utilization in the software products we use often exceeds 16GB RAM.

Our engineers' work stations are equipped with at least 32GB RAM.

If you ever have the chance to look at the bottom of an ICE high speed train, you will see: There is no free space whatsoever.

Continously growing requirements concerning mechanics, electrics and software caused virtual models to grow immensely.

Anyway, back to PDFs an Adobe's 32bit Reader: The PDF-file sizes mentioned above (200-300 MB) multiply within RAM, so we easily cross that 2 GB RAM border you suggested.

Larger PDF-files exceed 2 GB even on the hard drive - RAM can easily increase to 12 GB.

I hope I was able to make clear our point: A 64bit version under Windows 10 is absolutely necessary.

Kind regards!

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New Here ,
Apr 17, 2019 Apr 17, 2019

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ErSelbst; like you we have several clients that struggle with both Acrobat XI and 2015 when opening large files, or opening several files at once. "Out of Memory" is a typical error, if any – and accessing more RAM through a native x64 version would be a huge benefit. The fact that Adobe has not yet transitioned Acrobat to 64-bit for Windows is quite ridiculous...

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Adobe Employee ,
Apr 12, 2019 Apr 12, 2019

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If you would be willing to share a file that crashes Acrobat Pro on Windows due to size or complexity, we would be glad to examine what is going on and determine whether the issue is truly an address space issue (i.e. 32-bit versus 64-bit), a software bug, a problem with the PDF file itself, or something else. We would maintain full confidentiality. Please contact me via private message on these forums with a pointer to such a file and I will gladly pursue this.

FWIW, I have personally opened up exceptionally complex, graphic arts-based PDF files of over 500 megabytes in size and upwards of 100,000 pages with Acrobat Pro on Windows without any crashes. That is not saying that a problem of crashing (or other anomalies) due to running out of 32-bit address space couldn't happen, but I would really like to see examples to make the case for 64-bit. Note for the record, that Acrobat doesn't attempt to read the entire PDF file into memory at one time and thus, the file size itself wouldn't be the governing factor. On the other hand, an exceptionally large and graphically-complex single page PDF file just might be an issue.

Again, we would like to work with you to track down the problem (and perhaps make the case of 64-bit Acrobat on Windows sooner rather than later). Thanks for your assistance.

          - Dov

PS:     I think you can reasonably assume that there will be 64-bit Acrobat/Reader for Windows. The question is priority and when. 

- Dov Isaacs, Principal Scientist, Adobe

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Community Beginner ,
Apr 12, 2019 Apr 12, 2019

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Dear Dov,

thank you very much for your offer.

I am going to send you one of the problematic PDF files next week.

I am very curious if you will be able to reproduce our problem.

Will contact you via PM.

Thanks again and have a good weekend!

Hermann.

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New Here ,
Apr 20, 2019 Apr 20, 2019

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Ridiculous = True.

I have just found this thread after uninstalling Adobe Acrobat DC.

After uninstalling it for the 4th to 6th time.

I got an i5 8600K with 16Gb or Ram.

I have come to the conclusion that when it comes to Acrobat, Adobe couldn't care less about our opinions. They just keep thinking a 127 page Set of 2D architect drawings loads just like a the average text email converted to PDF they send around the office on a daily.

Even when the obvious couldn't be more obvious, they send senior moderators to discourage you from what you are experiencing with your own eyes and soon to run out patience.

I I have just asked ABBY at the office about alternatives.

She's 64 years old and an incredible multi-tasker.
What a FINE lady.
One of the best pdf READERs we've ever hired.

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New Here ,
Apr 24, 2019 Apr 24, 2019

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Not to mention if you increase those 127 pages of 2D drawings to more than 3000 pages of both drawings, text and scanned pages – which is only ONE of FIFTY SIX files that ideally should be combined into 5 files, or even 1 – totalling well over 200.000 pages.

Welcome to the world of Offshore Engineering, specifically the "Manufacturing Record Book".

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New Here ,
Aug 14, 2019 Aug 14, 2019

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I too would benefit from a 64 bit solution. I frequently have multiple very large pdfs open at the same time and then trying to navigate through them is a nightmare especially if the pages are scanned images instead of readable text (or OCR'ed content). I have to be careful how many I have open because it is super easy to lose an hours work with one extra click which has happened many times. I routinely have 15-20 pdf's open with file sizes ranging from 3-100mb a piece and I need to switch back and forth between them constantly. And dont even get me started on if i need to OCR a large file or Combine a large number of PDFs/.doc/.xls etc to PDF.

Adobe, get on this. My IT department was looking for it to upgrade me to it and... not avaliable >.<

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Adobe Employee ,
Aug 14, 2019 Aug 14, 2019

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FWIW, there is great internal support for x64 support for Acrobat on Windows, especially including yours truly (who almost on a daily basis gets snagged by the 32-bit address space limitations) and due to the fact that even Microsoft has made Office install the x64 version by default.

If you really want to influence this as a priority, go to Acrobat for Windows and Mac: Top (2791 ideas) – Share your feedback on Acrobat DC  and express your needs for x64 there.

          - Dov

- Dov Isaacs, Principal Scientist, Adobe

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New Here ,
Sep 23, 2019 Sep 23, 2019

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I understand that Acrobat, adobe air etc.. will not work on my late 2012 iMac when Catalina OS is updated. Is this correct

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New Here ,
Oct 13, 2019 Oct 13, 2019

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This is my first post to Adobe Support Community.  

I have a MacBook Air II computer running OS Mojave version 10.14.6.  I am aware that this operating system is the last one to be compatible with 32-bit software.  When I checked for Legacy Software, the only part of Adobe Flash Player that was 32-bit was the Adobe Flash Player Install Manager.  Tonight I tried reinstalling Adobe Flash Player, in an attempt to update the Flash Player Install Manager to 64-bit.  But when I restarted the computer after install and checked Legacy Software again, it appears that the Flash Player Install Manager has not been updated to 64-bit.  

Could you please indicate when the 32-bit Flash Player Install Manager will be available in 64-bit?  

OS Catalina has just been released and 32-bit software will not run on it.  At some point, Apple will insist that users move from OS Mojave to OS Catalina.   Thank you in advance for your reply.  -- Irene3

 

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Most Valuable Participant ,
Oct 14, 2019 Oct 14, 2019

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You posted in the incorrect forum. This forum is about Acrobat. There should be a forum (at least, there used to be...) about Flash Player. That's where you should ask your question.

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New Here ,
Oct 18, 2019 Oct 18, 2019

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Hi - i've just updated my Mac software to MacOS 10.15, and i am unable to use the free subscription to Adobe Reader; receiving the following error message; "Adobe Reader needs to be updated.". I've tried to update the Adobe software, but 10.15 isn't an option in step 1 of that process (yet i'm told that Adobe reader is compatible to 64 bit; which leaves me confused). Could you please tell me what else i need to do to get this problem solved? Thanks in advance, Nick

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New Here ,
Oct 23, 2019 Oct 23, 2019

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i want to change AcroPDFLib from 32 bit to 64 bit.  If i change the target compilation type to X86 it works fine. But i cannot change only one dll, as i have many dlls in my application, in which all dlls are built with Target CPU=All CPUs.

So what is the solution to this problem?

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Adobe Community Professional ,
Feb 01, 2020 Feb 01, 2020

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Hi,

 

The best approach that you can follow is to create a batch script like shown here: https://www.youtube.com/watch?v=t-6dmZjDZjw  to re-register all of your DLL's and discover exactly to which programs they are associated with. This is by far the  best method I've found to do this. See more in-depth tips of the same method here: https://www.youtube.com/watch?v=KD5RVG7CKCA  with additional troublehsoting tips

 

If you're using a 64 bit operating system like Windows 10, keep in mind that 32bit DLLs are registered in C:\Windows\SysWOW64  and the 64bit DLLs are registered in the systen wide 32bit library C:\Windows\System32.

 

The way DLLs are registered in a 64bit OS like Windows 8 or later, works differently than the logic of installing 32bit programs to C:\Program Files(x86) and 64bit programs to C:\Program Files. 

 

C:\Windows\SysWOW64   acts as a container to interface 32bit DLLs with the 64bit programs.

 

See this thread where this logic was applied to resolve crashes of AdobeXD producing white screens on Windows 10: https://community.adobe.com/t5/adobe-xd/troubleshooting-adobe-xd-crashes-white-screen-on-launch-on-w...

 

In adition, since the recent end of support for Windows 7 reached its EOL support cycle a few days ago, the upgrade to the latest version of Windows 10, 1909 that was published in November 2019 is still free. 

 

At this time, there is no need  to buy Windows 10  if you still have older versions of the OS running in not so old hardware that can  meet the criteria with minimum installation requirements.

 

My point is that , all of the .Net redistributables that you may end up struggling with without the update are now included in that update to version 1909. And because Microsoft is also phasing into a 64bit-only world (where they don't consider is safe to continue to run 32bit apps (unless containerized by more complicated methods)), now you can also download and install the new MS Edge Browser. It is  basically a Chrome browser with the coolest ability to install 64bit extension from the Google Playstore and other stores as well.

 

That said, YES you can install the Adobe Acrobat extension in MS Edge and not even worry about which browser is the default web browser anymore; with this extension enabled it allows the user to perform a single click to open a PDF from  a URL that is currently viewed in MS Edge  in Acrobat or Reader.

 

And this is the closest that you can get  to a 64bit Acrobat+Windows+web browser workflow in 2020.     

 

 

 

 

Fix Windows Errors by Re-registering All Your DLL's by BritecThe instructions basically get you to dump all DLL files into notepad, then do a find and replac...
Re-Register all of the DLL's on your computerIf your computer suffering from dll error messages or you have a corrupt dll file and you want to Fix DLL Error ...

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Adobe Community Professional ,
Feb 03, 2020 Feb 03, 2020

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+++++CORRECTION

 

 

I made a mistake, I meant to say that the new MS Edge browser allows to install extensions from other stores, such as Chrome Web Store, not Google Playstore.

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Most Valuable Participant ,
Apr 29, 2021 Apr 29, 2021

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LATEST

Here's the latest on a 64-bit Windows version of Acrobat:

 

https://community.adobe.com/t5/acrobat/adobe-acrobat-pro-64-bit/td-p/11831560

 

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