Toolbox deactivated on VBA excel 2016

I am on Mac OS, I have excel 2016 and the ToolBox is deactivated. How can I activate it? Can someone help me plz ?
hey helloAsked:
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In the Forms Designer, on the Developer tab, in the Tools group, click ----------------------.bmpControl toolboxControl Toolbox.

Can you open the VBA editor in that workbook? (Developer menu item, Visual Basic button in the 'Code' section or just hit ALT+F11)
If the VBA editor opens, check to see that the sheet security has not been reduced by clicking File > Options > Trust Center > Trust Center Settings button > ActiveX Settings and make sure 'Disable all controls without notification' has not been selected.

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hey helloAuthor Commented:
First of all, thank you Misha
but it didn't work, I looked for "Disable all controls without notification" button ( I clicked on Excel > preferences > Security Privacy > ... )  but it is not selected. So I suppose the sheet security has not been reduced.
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