Any process, such as recognition of nutrient depletion, that activates or increases the rate of macroautophagy to bring cytosolic macromolecules to the vacuole/lysosome for degradation. [ http://www.ncbi.nlm.nih.gov/pubmed/9412464 GOC:go_curators ]
Synonyms: up regulation of macroautophagy up-regulation of macroautophagy upregulation of macroautophagy positive regulation of starvation-induced autophagy