Hi,
I hope you can help me. I have Quark Core - Wallet v0.10.6.3 on a macbook pro with high sierra. I just opened the wallet for the first time in almost two years. It has processed 6053438 blocks of transaction history. Last received block was generated 1 year and 40 weeks ago. It reads (out of sync) and no block source available. The progress bar is about 2/3 complete and stopped. Any idea of what I can do to fix this problem? Thank you, Michael