ADB issues in ubports-installer on MacOS, suggested fixes.
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 Ive had a few attempts trying ubports for Nexus 4 but encountered a few problems. First one is with the app connecting to phone after initial boot to fastboot. The workaround (kindly suggested to me) was to open ubports-installer via terminal with sudo. 
 In terminal, executing 'sudo /Applications/ubports-installer.app/Contents/MacOS/ubports-installer' solves this issue.Secondly There appears to be an issue with adb pushing files after the download process. It looks like the adb has a problem with the location of the downloaded files. On the mac, the location is at: 
 Users/<username>/Library/Application Support/ubports/poolIts possible that during the adb push, adb cant find the location of the file because of the space in 'Application Support' folder (Application<space>Support). If this is is the case, as a suggestion, could the app work within.. 
 /Users/<username>/Documents
 Or
 /Users/<username>/DownloadsBelow is the terminal output during attempt to push files. Any help would be appreciated, and if further details are required, please contact me, cheers  Terminal output: 
 info: Download complete
 debug: adb shell: cat /etc/recovery.fstab
 debug: Running platform tool exec cmd adb -P 5038 shell cat /etc/recovery.fstab
 debug:
 debug: adb shell: umount /cache
 debug: Running platform tool exec cmd adb -P 5038 shell umount /cache
 debug:
 debug: adb shell: make_ext4fs /dev/block/platform/msm_sdcc.1/by-name/cache
 debug: Running platform tool exec cmd adb -P 5038 shell make_ext4fs /dev/block/platform/msm_sdcc.1/by-name/cache
 debug:
 debug: adb shell: mount /cache
 debug: Running platform tool exec cmd adb -P 5038 shell mount /cache
 debug:
 debug: adb shell: mount -a
 debug: Running platform tool exec cmd adb -P 5038 shell mount -a
 debug:
 debug: adb shell: mkdir -p /cache/recovery
 debug: Running platform tool exec cmd adb -P 5038 shell mkdir -p /cache/recovery
 debug:
 info: Start pusing 13 files
 debug: Running platform tool exec cmd adb -P 5038 push /Users/macbookpro/Library/Application Support/ubports/pool/ubports-e5cf0885f061c9615931cf863a43f65d8590aa71027315ad71999252ce118868.tar.xz /cache/recovery/
 debug: Error: Command failed: adb -P 5038 push /Users/macbookpro/Library/Application Support/ubports/pool/ubports-e5cf0885f061c9615931cf863a43f65d8590aa71027315ad71999252ce118868.tar.xz /cache/recovery/at ChildProcess.exithandler (child_process.js:217:12) at emitTwo (events.js:106:13) at ChildProcess.emit (events.js:194:7) at maybeClose (internal/child_process.js:899:16) at Socket.<anonymous> (internal/child_process.js:342:11) at emitOne (events.js:96:13) at Socket.emit (events.js:191:7) at Pipe._handle.close [as _onclose] (net.js:510:12)error: Devices: Error: Adb push error: 
 error: Devices: Adb push error:
 debug: Running platform tool exec cmd adb -P 5038 shell stat -t /cache/recovery//ubports-e5cf0885f061c9615931cf863a43f65d8590aa71027315ad71999252ce118868.tar.xz |awk '{print $2}'
 debug:
 info: Adb push, NaN% left
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 better also open an issue on github https://github.com/ubports/ubports-installer/issues 
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 https://github.com/ubports/ubports-installer/issues/68 
 https://github.com/ubports/ubports-installer/pull/71An issue has already been recorded and a Pull Request pending. I recommended a posting here to have issue documented in forums and a possible solutions found. Thanks for helping us out damian. 
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 @galaxia always glad to help and contribute where i can  
