  The MEG II experiment at Paul Scherrer Institute (PSI) in Switzerland aims to
achieve a sensitivity of $6\times10^{-14}$ on the charged lepton flavor
violating decay $\mu^+\to e^+\gamma$. The current upper limit on this decay is
$4.2\times10^{-13}$ at 90% Confidence Level (CL), set by the first phase of
MEG. This result was achieved using the PSI muon beam at a reduced intensity,
$3\times10^7~\mu^+/$s, to keep the background at a manageable level. The
upgraded detectors in MEG~II can cope with a higher intensity, thus the
experiment is expected to run at a $7\times10^7~\mu^+/$s intensity. The new low
mass, single volume, high granularity tracker, together with a new highly
segmented timing counter, guarantees better resolutions for the positron
detection. Moreover, the replacement of the old PhotoMultiplier Tubes (PMTs)
with Multi-Pixel Photon Counters (MPPCs) in the inner face of the liquid xenon
photon detector improved its performance. The details of the upgraded detectors
and their present status will be discussed, together with the latest results
from last year's pre-engineering run and the perspective for the 2021 run, the
first with all the detectors and electronics installed.
