Running 

sudo xattr -r -d com.apple.quarantine $YOUR_DIRECTORY 

mostly helps.

René

> On 16 Jul 2021, at 14:10, P.O. Jonsson <oor...@jonases.se> wrote:
> 
> What version of MacOS are we talking about? In the past extracting the .dmg 
> caused a warning that could be overwritten but I never experienced that rexx 
> would not launch? Is this a M1 thing only? Or „Fat Binary“ problem? Does it 
> help to install to ~/Applications (a local install) rather than to 
> /Applications (Install for all users)? 
> 
> I run High Sierra (10.13) and the build machine runs Mojave (10.14). In view 
> of the age of the build machine (~ late 2014) I would not go beyond Catalina 
> (10.15) and I see no gain in changing, just risk of running into problems 
> with outdated hardware.
> 
> We do not have at our disposal any machine with macOS Big Sur (11.1) that can 
> run on either Intel or M1 hardware.
> 
> What I can try to do is to see if I can get some Virtual Machines set up with 
> Catalina/Big Sur. But it will not be on M1 hardware.
> 
> Hälsningar/Regards/Grüsse,
> P.O. Jonsson
> oor...@jonases.se <mailto:oor...@jonases.se>
> 
> 
> 
>> Am 16.07.2021 um 13:47 schrieb Rony G. Flatscher <rony.flatsc...@wu.ac.at 
>> <mailto:rony.flatsc...@wu.ac.at>>:
>> 
>> Downloaded the latest MacOS version of ooRexx 5.0 from the ooRexx project 
>> page at sourceforge. 
>> 
>> It turns out that Apple inhibits using anything from that dmg as it was 
>> downloaded from the Internet and not from Apple's store! :(
>> 
>> This is due to Apple's "security policy" that they put in effect, which 
>> simply deprive the owners of those Apple computers. 
>> 
>> Here are two use cases, each demonstrated with an attached screenshot:
>> 
>> Scenario 1: installing ooRexx according to the readme will create 
>> "/Application/ooRexx5" with the "bin", "lib" etc directories. Trying to run 
>> "/Application/ooRexx5/bin/rexx -v" causes "Screenshot 2021-07-16 at 
>> 12.46.04.png" to pop up. Apple suggests to move the program to the bin! :-(
>> 
>> Scenario 2: using Finder to "open" (run) "/Application/ooRexx5/bin/rexx" 
>> yields at first a pop up that seems to indicate, that further opening would 
>> allow the program to run from now on, cf. "Screenshot 2021-07-16 at 
>> 12.53.17.png". However when "rexx" loads the "librexx.4.dylib" the "Move to 
>> Bin" popup as above gets displayed!
>> Probably turning off SIP 
>> (<https://apple.stackexchange.com/questions/208478/how-do-i-disable-system-integrity-protection-sip-aka-rootless-on-macos-os-x>
>>  
>> <https://apple.stackexchange.com/questions/208478/how-do-i-disable-system-integrity-protection-sip-aka-rootless-on-macos-os-x>)
>>  will allow this to work again, however, asking users to turn off SIP may be 
>> too much.
>> 
>> The alternative would be to get and use the keys from Apple and use them to 
>> sign the ooRexx executables. 
>> 
>> The question then is, who should apply/buy this: RexxLA or some individual 
>> developer in this group who signs the releases? Who is going to pursue this?
>> 
>> ---rony
>> 
>> P.S.: @Enrico: this may be also the reason why on M1 with a stricter 
>> "security policy" in place would not pick the amd64 binaries from the fat 
>> distribution! If you look at the first screen shot you can read "Reason: no 
>> suitable image found.", the same error message as on M1, but here there is 
>> additional information pointing ad "Library Validation: ..." that fails.
>> 
>> This behavior might not be present if you create ooRexx on the M1 and run it 
>> from there, as then the binaries did not come from "insecure locations" 
>> according to Apple (which is the Internet and locations that are not under 
>> the control of Apple software). 
>> 
>> 
>> 
>> <Screenshot 2021-07-16 at 12.46.04.png><Screenshot 2021-07-16 at 
>> 12.53.17.png>_______________________________________________
>> Oorexx-devel mailing list
>> Oorexx-devel@lists.sourceforge.net 
>> <mailto:Oorexx-devel@lists.sourceforge.net>
>> https://lists.sourceforge.net/lists/listinfo/oorexx-devel
> 
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