Starting Multiple Scripts Simultaneously

Procedure

1. Create a Master Script

1. In the Automator (Figure 1), click the New Script button to create the master script.
2. Select the new master Script and edit it with the Edit Script button. This pops up the Script Editor (Figure 2).
3. Name the Script with a logical name such as "Run All Scripts".

Help Reference Link: Automator

2. Add Run Script Steps to the Master Script

1. In the Script Editor (Figure 2), select the 'Run Script' step item the Step Type list. Now click the Add Selected Step button.
2. From the resulting Select Scripts dialog, select all the scripts that you want to run from the master script.
3. The added Steps will appear in the Script Summary panel to the right of the edit controls. (Figure 2)

Help Reference Link: Script Editor

3. Configure the Steps so They Start at the Same Time

Normally, Script Steps will execute in sequential order which means that each step waits for the previous step to complete before it starts. But in this case, you want all steps in the master script to start exactly at the same time. We achieve this effect by enabling the Offset Time of each 'Run Script' step.

1. In the Script Editor (Figure 2), select the Edit Steps button.
2. In the resulting Manage Script Steps list dialog, select a Step, then click the Edit button. This pops up the Step Editor (Figure 3).
3. Check the Enable Offset Time checkbox
4. Leave the Offset Time values set to 0,0,0,0. This tells the Automator to start this step at zero (0) seconds after the containing script starts to run (effectively start the step immediately).

Repeats the above procedure for all steps contained in the master script.

Help Reference Link: Step Editor

4. Test the Master Script

Select the Master Script from the Automator window. Click the Run Script button. Then confirm that all scripts begin executing immediately and that you can control them (Pause, Resume, Stop) as a group.