Tag Archives: imac-tc1

How to turn off ‘app nap’

On a mac, there is this clever tool to turn off (parts of) applications that the computer thinks you are not using. This tool is called ‘app nap’.

For jamaseis, this has to be turned off. The following video shows how:




(Note: The initial part of the video shows how you can access the relevant settings by right clicking. You may need to hold down the control key on the keyboard while clicking to get to the contextual menus).


iMac + tc-1

TC-1 on the left, connected through an Arduino and amplifier to the iMac


  • 21″ iMac, c2008 model
  • 3GB RAM
  • 320GB HDD (divided into system and data partitions)

software environment

  • MacOS X 10.9.x
  • ESET NOD32 – antivirus
  • Casper client – platform management
  • Current JRE 7, JRE 6 (Arduino)
  • jAmaseis
  • Arduino IDE/drivers
  • Owncloud desktop client – synchronization/backup
  • Energy Saver
    energy saverT

    he energy saver settings are applied to the iMac using a policy in our Mac management tool, Casper (not to be confused with Kasper!). Even if these settings are modified by a local administrator, they will revert to those shown above when Casper refreshes the policy on the machine -if a School using one of these,needs us to modify the settings, we can unlock the policy  -let Kasper know.

(italicised items are specific components of the University platform being used here and NOT requirements for the basic seismograph)

user configuration


  • scienceit
    Standard administrative user account used to manage Macs in Science at the University of Auckland. Used for remote management, updates, etc.
  • seismometeradmin
    An administrative account for the project participants -used to install and upgrade the software specific to the project.
  • seismometeruser
    The workhorse account. A standard user.

seismometeruser environment

  • Automatic log in
    automatic login
  • Login items
    login items
  • Dock
  • Owncloud
    Owncloud settings
    configure Owncloud to synchronize /Volumes/data/data
  • /Volumes/data/data
    data on data
  • /Users/seismometeruser
    ln -s /Volumes/data/data/jamaseisData /Users/seismometeruser/jamaseisData

jAmaseis configuration

Prevent App Nap
prevent appnap

Set up local seismometer source (see configuring the TC-1).

Configure screenshot uploads
jAmaseis settings

Platform instances

[catlist tags=imac-tc1 post_status=any post_type=post excludeposts=this]