Hi when I try to install OPENBUILDS CONTROL on my old macbook I get the following error The following disk images couldn't be opened OpenBuilds CONTROL- no mountable file systems. I'm using MAC OSX El Capitan Version 10.11.6
Do double check the download completed correctly though, download corrupted during download might also fail to mount. 'No Mountable File System' Mac Error: Can't Open Disk Images If it is a case of OS being out date: Install Windows on your older Mac using Boot Camp (; run Win10 on it (; (If apple doesn't want to provide OS updates for older hardware that is)
It did say to try and run it in terminal with a curl command followed by the exact url of the dmg file.