Slow sync running Bitcon full node on Mac Mini OSX It is Jul 2018, I need help after several attempts to sync a full node running on a Mac Mini.

I have tried several times and Bitcoin-qt starts pretty well for the initial sync, downloading with progress that ranges from 1% per hour up to 3 % per hour. But when sync goes around 30% (blockchain around 50 GB) sync slows down to 0.2% per hour so it'd take weeks.

HARDWARE:


1.4GHz dual-core Intel Core i5  
OSX 10.13.6  
500GB (5400-rpm) hard drive   
RAM 4GB of 1600MHz LPDDR3 memory   
Good internet speed.  


SOFTWARE:


Installed Bitcoin Core implementation 0.16
I tried both, installing the .dmg for mac and also tried to homebrew 
Both successful in the beginning, and then sync goes down


I get good connections, and I have the port 8333 opened so I have no clue of what is going on, whether it is problem with the hardware (mac works fine) or the implementation.

Actually I have been running Litecoin and Monero nodes in the same hardware, implementing OSX builts and those worked fine, but Bitcion Core doesn't .

I hope someone can help me, if faced the same difficulties with bitcoin.
I really would like to succeed in this and support the network
Syncing the bitcoin blockchain on lower-end hardware takes it's time. Just let it run.