That's what I'm thinking. I'm going to do some research tonight. I'll report 
back what I find out. 

Sent from my iPhone

> On Aug 25, 2017, at 07:03, TedVanGaalen <ted...@gmail.com> wrote:
> 
> Hi John,
> … thanks. another wild, wild guess:
> it could then perhaps be, (if Pharo uses Open GL) that my graphics
> card has Open GL incompatibility?  or that Pharo 6.1 uses Open GL
> calls not implemented on an  Intel HD Graphics 4000  chip as in my mac mini?
> 
> kind regards
> TedvG
> 
> 
> 
>> On 25. Aug 2017, at 06:56, John Pfersich [via Smalltalk] <[hidden email]> 
>> wrote:
>> 
>> I don't know if it matters, but on my Retina 5K, 27 inch, Late 2015 iMac, 
>> AMD  Radeon R9 M395 wirh 2048 MB running MacOS 10.12.6 I don't have a 
>> problem resizing or maximizing Pharo 6.1.
>> 
>>> On Mon, Jul 31, 2017 at 6:28 AM, Ted F.A.van Gaalen <<a 
>>> href="x-msg://3/user/SendEmail.jtp?type=node&amp;node=4963988&amp;i=0" 
>>> target="_top" rel="nofollow" link="external" class="">[hidden email]> wrote:
>>> 
>>> 
>>> 
>>> Hi, I reverted to 5.0 because Pharo 6.0 and 6.1 64 bit hangs on 
>>> my Mac Mini with UDH 4K screen (may that has to do with?)
>>> with its maiden image (at first start after download
>>> when:  I resize or go to full screen. Maybe VM problem?
>>> my mac Mini metrics:
>>> Hardware Overview:
>>> 
>>>   Model Name:       Mac mini
>>>   Model Identifier: Macmini6,2
>>>   Processor Name:   Intel Core i7
>>>   Processor Speed:  2,6 GHz
>>>   Number of Processors:     1
>>>   Total Number of Cores:    4
>>>   L2 Cache (per Core):      256 KB
>>>   L3 Cache: 6 MB
>>>   Memory:   4 GB
>>>   Boot ROM Version: MM61.0106.B1F
>>>   SMC Version (system):     2.8f0
>>> 
>>> maybe this problem was already reported, but could find it. 
>>> 
>>> 
>>> Kind Regards
>>> TedvG
>>>  
>>>    
>>> 
>> 
>> 
>> 
>> If you reply to this email, your message will be added to the discussion 
>> below:
>> http://forum.world.st/Pharo-6-0-and-6-1-64-bit-freeze-on-MacMini-tp4957969p4963988.html
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>> NAML
> 
> 
> View this message in context: Re: Pharo 6.0 and 6.1 64 bit freeze on MacMini
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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